Complete Checklist Before Your First Aquarium Setup

Setting up your first aquarium is an exciting step into the world of aquascaping and fishkeeping. A well-planned start will keep your fish healthy, your water clear, and your hobby enjoyable instead of stressful. This complete checklist will guide you through every decision, from choosing the tank size to adding your first fish safely. MB Store offers aquariums and aquarium equipment you can rely on, so you can focus on creating a thriving underwater world.

Planning Your First Aquarium: Key Decisions Before You Buy

Before you purchase anything, it is essential to pause and define your goals. Clear decisions at this stage will save you money, time, and frustration later on.

1. Decide on freshwater or saltwater

For a first setup, almost all beginners are best served by a freshwater aquarium. Freshwater systems are more forgiving, cheaper to equip, and easier to maintain than marine tanks. Popular options include peaceful community fish (tetras, rasboras, livebearers), a single feature fish (like a betta), or a species-focused tank such as shrimp or a group of dwarf cichlids.

2. Choose the right tank size

Paradoxically, very small tanks are harder, not easier. Water parameters change quickly in small volumes, stressing fish and requiring constant attention. As a rule of thumb, 60–80 litres (about 15–20 gallons) is an excellent beginner size: large enough for stability, small enough to fit in most homes. If space allows, going bigger is almost always better.

Common beginner tank sizes:

• 30–40 L: Only for a single betta or very small nano setups.
• 60–80 L: Good for small community fish and basic aquascapes.
• 100 L and above: More stocking options and increased stability.

MB Store offers a range of aquariums in different volumes and shapes, including rectangular tanks that are easier to light, scape, and maintain, making them ideal for your first setup.

3. Pick a good location

Where you place the aquarium can influence its long-term success.

• Keep it away from direct sunlight to reduce algae growth and overheating.
• Place it on a level, sturdy stand that can bear the full weight of water, glass, and decor.
• Ensure access to electrical outlets without stretching cables dangerously.
• Avoid high-traffic areas where bumps and vibrations are frequent.

Remember: a filled tank weighs roughly 1 kg per litre, plus glass, equipment, and hardscape. A 100 L aquarium can easily weigh over 130 kg.

4. Plan your stocking list in advance

Impulse purchases are one of the fastest ways to overcrowd a tank. Before you buy fish, research:

• Adult size of each species, not just juvenile size.
• Temperament (peaceful, semi-aggressive, territorial).
• Water parameter needs (hardness, pH, temperature).
• Preferred level in the tank (top, mid, bottom dwellers).

Prepare a written list of compatible species and maximum numbers for your aquarium size. Bring this list when you shop at MB Store; it will help you stay focused and select appropriate fish and equipment.

Essential Equipment Checklist: What You Need Before Filling the Tank

The right equipment provides a stable environment and minimizes daily hassle. Here is a detailed checklist for your first aquarium purchase.

1. Aquarium and stand

At minimum, you need:

• A well-constructed glass or acrylic tank without cracks or chips.
• A dedicated aquarium stand or cabinet rated for the weight.
• A foam or rubber mat (if recommended by the manufacturer) to distribute weight.

MB Store offers complete aquarium sets as well as individual tanks and stands, which is particularly useful if you want to customise the lighting or filtration.

2. Filtration system

A reliable filter is the heart of your aquarium. It provides mechanical, chemical, and—most importantly—biological filtration, where beneficial bacteria convert toxic ammonia into less harmful compounds.

Main filter types:

• Internal filters: Compact and easy to install, suitable for smaller tanks.
• Hang-on-back filters: Great for beginners; easy access for cleaning.
• External canister filters: Powerful, quiet, ideal for medium to large tanks.
• Sponge filters: Air-driven, excellent for shrimp tanks and breeding setups.

Choose a filter rated at least for the volume of your tank, preferably with a safety margin of 20–50%. At MB Store you can find filters, filter media, and replacement parts that match different aquarium sizes and budgets.

3. Heater and thermometer

Many tropical freshwater fish require temperatures around 24–26 °C. A good heater with an integrated thermostat is essential unless you keep strictly cold-water species.

• Use roughly 1 watt per litre as a broad estimate (for example, a 100 W heater for a 100 L tank), adjusting for room temperature.
• Place a separate thermometer on the opposite side of the tank to confirm actual temperature.

4. Lighting

Quality lighting affects both the appearance of your aquarium and the health of plants. For a first tank:

• Choose LED lights designed for aquariums; they are energy-efficient and long-lasting.
• Start with 6–8 hours of light per day, using a timer to maintain consistency.
• Match light strength to your plant choice: low to medium light is more forgiving.

MB Store offers dedicated aquarium LED lights that fit standard tank lengths, making it easier to provide the right spectrum and intensity for your setup.

5. Substrate

The substrate forms the base of your aquascape and can play an important role in water chemistry and plant growth.

• Inert sand or gravel: Simple, stable, suitable for most fish-only setups.
• Plant substrates: Nutrient-rich, ideal for live plants, sometimes slightly lower pH.
• Specialised substrates: For shrimp or delicate species, designed to maintain specific conditions.

Rinse inert substrates until the water runs nearly clear. Follow product instructions for enriched substrates, as over-rinsing can remove useful minerals.

6. Water conditioner and test kits

Tap water often contains chlorine or chloramine that harms fish and beneficial bacteria. Always use a water conditioner to neutralize these chemicals before water enters the tank.

Additionally, obtain liquid test kits or high-quality strips to monitor:

• Ammonia (NH₃/NH₄⁺)
• Nitrite (NO₂⁻)
• Nitrate (NO₃⁻)
• pH

Regular testing is vital during the first weeks and later for routine checks, helping you catch problems before they become serious.

7. Essential tools and accessories

Do not overlook simple tools that make maintenance easier:

• Algae scraper or magnetic cleaner for glass.
• Siphon gravel vacuum for water changes.
• Dedicated bucket (used only for aquarium water, never cleaning agents).
• Fish net of appropriate size.
• Aquarium-safe sealant for occasional minor repairs.
• Timer for lights to maintain a regular day/night cycle.

MB Store can supply these accessories along with core aquarium items, helping you build a complete toolkit in one purchase.

Decor, Plants, and Aquascape: Designing a Functional Underwater World

Good design is not just about visual appeal. Your aquascape provides shelter, territories, and natural behaviour cues for fish, as well as surfaces for beneficial bacteria to colonize.

1. Hardscape: rocks and wood

When choosing rocks and driftwood, ensure they are aquarium-safe and will not leach harmful substances:

• Use rocks intended for aquariums; some can alter hardness and pH, which may be desirable or problematic depending on your fish.
• Driftwood should be properly cleaned; some types release tannins that tint the water a tea colour, usually harmless and even beneficial for certain species.
• Avoid sharp edges that might injure active fish.

Rinse rocks and wood thoroughly and, when possible, pre-soak wood to reduce floating and initial discoloration of the water.

2. Live plants vs artificial plants

For beginners, hardy live plants are highly recommended. They absorb nutrients, help control algae, improve water quality, and make the aquarium look more natural.

Easy live plant choices include:

• Anubias and Java fern (attach to rocks and wood, not buried in substrate).
• Cryptocoryne species for midground planting.
• Fast-growing stems like hygrophila or hornwort for nutrient uptake.
• Floating plants that provide shade and cover for shy fish.

If you start with artificial plants, ensure they are safe for aquariums and free of sharp or peeling parts. Naturalistic colours and shapes reduce stress for fish.

3. Layout and fish behaviour

Think about how your fish will use the space:

• Bottom dwellers (corydoras, loaches) need soft substrate and open areas.
• Schooling fish (tetras, rasboras) appreciate open swimming zones in the middle and top sections.
• Territorial fish (some cichlids, gouramis) benefit from caves, visual barriers, and broken lines of sight.

Create distinct zones: a planted background, open central area, and structured foreground or midground. This not only looks balanced but also reduces aggression and stress among inhabitants.

4. Background and cover

Adding a simple background—coloured film, painted surface, or decorative poster—hides cables and enhances the viewing experience. Dark backgrounds often make fish colours more vivid.

Ensure the tank has a lid or cover glass. Many species are excellent jumpers, especially when startled, and a cover helps slow evaporation while keeping fish safely inside.

The Nitrogen Cycle and Safe Start-Up: Preparing the Aquarium for Life

One of the most important steps is invisible: establishing the biological filter, also called “cycling” the aquarium. Skipping or rushing this step is a common beginner mistake that leads to stressed or dying fish.

1. Understanding the nitrogen cycle

Fish release waste into the water as ammonia, which is highly toxic even at low concentrations. Beneficial bacteria colonize the filter and surfaces in the tank, processing this waste:

• Ammonia is converted into nitrite (still toxic).
• Another group of bacteria converts nitrite into nitrate (much less toxic).
• Nitrate is then removed by plants and regular water changes.

Until these bacteria are established, your aquarium is not safe for a full fish load.

2. Step-by-step: cycling your aquarium

• Set up the tank completely with substrate, decor, equipment, and plants.
• Fill with treated water using your water conditioner.
• Turn on the filter and heater; let the system run continuously.
• Add a source of ammonia: either bottled ammonia for fishless cycling, a pinch of fish food daily, or a specially formulated bacterial starter according to instructions.
• Test water regularly for ammonia, nitrite, and nitrate.

The cycling process generally takes 3–6 weeks. It is complete when ammonia and nitrite consistently measure 0, and nitrate is present at a moderate level. Only then is the aquarium truly ready for fish.

3. Using bacterial starters and media

MB Store offers bacterial starters and filter media that can seed your aquarium with beneficial bacteria, often reducing cycling time. While they help, you should still monitor water parameters; do not assume the tank is instantly ready without testing.

4. Common cycling mistakes

• Adding a full stock of fish immediately after filling the tank.
• Over-cleaning the filter under tap water, killing beneficial bacteria.
• Switching off the filter for long periods, causing bacterial die-off.
• Feeding too much during early stages, leading to ammonia spikes.

Patience at this stage is one of the most valuable habits you can develop as an aquarist. A properly cycled tank forms the foundation of a healthy system.

Choosing and Adding Fish: Stocking Wisely and Safely

Once your aquarium is cycled, it is time for the most rewarding part: selecting and adding fish. Thoughtful stocking will keep your system balanced and your fish stress-free.

1. Build a compatible community

Use your earlier research to create a stocking plan. Combine species that share similar needs:

• Match temperature and pH preferences.
• Select species with compatible temperaments; avoid mixing aggressive fish with delicate ones.
• Consider activity levels so hyperactive species do not overwhelm calmer fish.

Common beginner-friendly groups include small tetras, rasboras, guppies, platies, corydoras, and peaceful dwarf gouramis. Discuss your choices with MB Store staff to confirm they suit your tank size and water conditions.

2. Add fish gradually

Even in a cycled tank, beneficial bacteria populations adjust to increased waste. Introduce fish slowly:

• Start with a small group: perhaps 20–30% of your final fish load.
• Wait one to two weeks, monitoring ammonia and nitrite.
• If readings remain safe, add the next group.

This stepwise approach prevents overload and allows your filter to adapt smoothly.

3. Acclimating new fish

Sudden changes in temperature or water chemistry can shock fish. Proper acclimation reduces this risk.

• Float the sealed bag in your aquarium for 15–20 minutes to equalize temperature.
• Open the bag and gradually add small amounts of tank water every 5–10 minutes.
• After 30–45 minutes, gently net the fish and release them into the tank. Discard bag water.

Observe new fish closely over the next few days for signs of stress: clamped fins, gasping at the surface, or refusal to eat. If you see issues, test water parameters immediately.

4. Considering a quarantine tank

Though optional, a small quarantine tank is a powerful prevention tool. New arrivals are kept here for a couple of weeks before entering the main aquarium, reducing the chance of introducing parasites and disease. A basic setup with sponge filter, heater, and hiding places is usually sufficient.

Routine Maintenance and Long-Term Care

After your aquarium is established, regular maintenance keeps the environment stable and your fish healthy. Building a simple schedule helps you stay consistent.

1. Weekly tasks

• Perform a partial water change of 20–30%. Use your gravel vacuum to remove debris from the substrate.
• Test water for nitrate, ammonia, and nitrite, especially in the first few months.
• Clean the glass with an algae scraper, taking care not to scratch it.
• Check equipment (heater light, filter flow, air pumps) for proper operation.

Always treat new tap water with conditioner before adding it to the aquarium. Match the temperature closely to avoid stressing fish.

2. Monthly or bi-monthly tasks

• Rinse filter media in a bucket of aquarium water (never tap water) to remove debris while preserving bacteria.
• Trim plants and remove dead leaves to prevent decay.
• Inspect all cables, plugs, and seals for wear and safety.

Do not replace all filter media at once, as this can cause the loss of much of your biofilter. Stagger replacements if needed, and always preserve a portion of the old media.

3. Feeding routines

Overfeeding is a frequent source of pollution. Offer only what fish can eat in 2–3 minutes, once or twice per day, depending on species. Remove uneaten food with a net or siphon. Diverse, high-quality diets—flakes, pellets, frozen or live foods—support vibrant colours and healthy immune systems.

4. Watching for signs of trouble

Early detection of issues can prevent major losses. Be alert for:

• Fish gasping at the surface or hiding constantly.
• Clamped fins, white spots, frayed tails, or visible parasites.
• Cloudy water, foul odours, or sudden algae blooms.

When problems appear, immediately test water. Many diseases are triggered or worsened by poor water quality. Correcting underlying parameters is as important as any medication.

5. Growing with the hobby

Once your first tank is stable, you may want to explore more advanced aspects: densely planted aquascapes, breeding projects, or even a carefully planned marine system. MB Store’s selection of advanced equipment—CO₂ systems, specialised lighting, higher-capacity filtration—allows you to expand confidently when you are ready.

Complete Pre-Setup Checklist

Before you bring home your first fish, confirm that everything on this checklist is ready and functioning:

• Appropriate aquarium size and sturdy stand in a safe location.
• Filter installed, running continuously, with suitable media.
• Heater and thermometer installed, stable at target temperature.
• Lighting system on a timer, providing 6–8 hours daily.
• Rinsed substrate and securely positioned hardscape.
• Live or artificial plants placed to create hiding spots and open areas.
• Water filled and treated with dechlorinator or conditioner.
• Nitrogen cycle underway or completed, confirmed with test kits.
• Written stocking plan with compatible species and numbers.
• Maintenance tools: bucket, siphon, net, algae scraper, test kits.

MB Store offers aquariums, filters, heaters, lighting, substrates, plants, and maintenance tools, allowing you to source everything from a single trusted supplier. With careful preparation and the right equipment, your first aquarium can be both beautiful and stable, giving you years of enjoyment watching a thriving underwater ecosystem.

FAQ

How long should I wait before adding fish to a new aquarium?
You should usually wait 3–6 weeks for the nitrogen cycle to establish. During this time, run the filter and heater, add an ammonia source or bacterial starter, and test water regularly. Add fish only when ammonia and nitrite read 0 and nitrate is present at a moderate level, then stock gradually.

How many fish can I keep in my tank?
It depends on adult fish size, activity level, and filtration. Simple rules like “one centimetre per litre” are rough estimates only. Research each species, consider their full-grown size, and aim for a lightly stocked tank at first. Good filtration, plants, and regular water changes allow slightly higher but still responsible stocking.

Do I really need a heater for my aquarium?
If you keep tropical species, yes—a heater is essential to maintain stable temperatures around 24–26 °C. Sudden swings caused by room temperature changes can stress or even kill fish. Only genuinely cold-water species, kept in consistently cool rooms, can safely go without a heater. Always monitor temperature with a separate thermometer.

Are live plants difficult for beginners?
Many live plants are quite easy. Choose hardy species like Anubias, Java fern, crypts, and simple stem plants, and provide moderate light and basic fertilisation. They help control algae, improve water quality, and create natural shelter. Starting with undemanding plants lets you enjoy greenery without complex equipment or advanced techniques.

How often should I clean the aquarium?
For most community tanks, perform a 20–30% water change once a week, vacuuming debris from the substrate. Clean glass as needed and gently rinse filter media in tank water monthly or bi-monthly. Avoid “deep cleaning” that removes all algae or replaces all media at once, since beneficial bacteria are crucial for biological stability.