Things You Need For A Fish Tank – The Ultimate Checklist

Setting up your first aquarium is a journey filled with excitement, color, and the serene beauty of nature brought indoors. However, if you are standing in the middle of a pet store aisle feeling overwhelmed by the rows of equipment, you are not alone.

Every experienced aquarist started exactly where you are today, wondering which items are essential and which are just fancy extras. When you first start researching the things you need for a fish tank, the sheer volume of information can feel like a tidal wave.

Don’t worry—this setup is perfect for beginners, and we are here to guide you through every step of the process. In this guide, we will break down the absolute essentials, explain why they matter, and help you build a healthy home for your new aquatic friends.

The Foundation: Things You Need for a Fish Tank to Get Started

Before you even think about the fish, you need to establish the physical “house” they will live in. Choosing the right foundation is the most critical step in ensuring long-term success and minimizing maintenance headaches down the road.

Choosing the Right Aquarium Size and Material

It might seem counterintuitive, but a larger tank is often easier to maintain than a small one. In a larger volume of water, chemical fluctuations happen much slower, giving you more time to react if something goes wrong.

Glass tanks are the standard choice because they are scratch-resistant and remain clear for decades. Acrylic tanks are lighter and offer unique shapes, but they scratch very easily, which can be frustrating during cleaning sessions.

For a beginner, a 20-gallon “long” tank is often considered the “sweet spot.” It provides enough volume for a variety of fish while remaining manageable for weekly water changes and cleaning.

A Sturdy and Level Aquarium Stand

Water is surprisingly heavy, weighing approximately 8.34 pounds per gallon. A 20-gallon tank will weigh well over 200 pounds once you add substrate and decorations, so a standard bookshelf simply won’t cut it.

Invest in a dedicated aquarium stand designed to distribute that weight evenly across the edges of the tank. Ensure the stand is perfectly level to prevent uneven pressure on the glass seams, which could lead to leaks over time.

The Tight-Fitting Lid or Hood

A lid serves three vital purposes: it prevents fish from jumping out, reduces evaporation, and keeps dust or household chemicals from entering the water. Most lids also come with integrated LED lighting fixtures.

If you plan on keeping “jumpers” like Bettas, Hatchetfish, or certain types of shrimp, a secure lid is a non-negotiable part of your setup. It keeps the environment stable and your livestock safe inside their home.

Filtration: The Life Support System

In the wild, rivers and lakes have natural ways of filtering waste, but in a closed aquarium system, you must provide a mechanical means of cleaning the water. Your filter is the most important piece of hardware you will own.

Understanding the Three Stages of Filtration

A high-quality filter should provide three types of filtration: mechanical, chemical, and biological. Mechanical filtration uses pads or sponges to trap physical debris, while chemical filtration (like activated carbon) removes odors and toxins.

The most important, however, is biological filtration. This involves providing a surface area for beneficial bacteria to grow. These bacteria convert toxic ammonia (from fish waste) into less harmful nitrates, keeping your fish alive.

Types of Filters for Different Needs

Hang-on-Back (HOB) filters are the most popular for beginners because they are easy to maintain and provide great oxygenation. They sit on the rim of the tank and pull water through a series of media cartridges.

Sponge filters are a fantastic, low-cost option for shrimp tanks or fry (baby fish) tanks. They provide gentle flow and a vast surface area for grazing, ensuring that small inhabitants aren’t sucked into an intake pipe.

For larger tanks (over 40 gallons), canister filters are the gold standard. They sit underneath the tank in the cabinet, offering massive filtration capacity and keeping the aquarium’s aesthetic clean and uncluttered.

Environmental Control: Heat and Light

Fish are ectothermic, meaning they cannot regulate their own body temperature. They rely entirely on the water around them to stay healthy, making temperature stability a top priority for any aquarist.

Submersible Heaters and Thermometers

Unless you are keeping cold-water species like Goldfish, you will likely need a submersible heater. Most tropical fish thrive in temperatures between 75°F and 80°F, and even a slight drop can stress their immune systems.

Always pair your heater with a separate thermometer. Don’t just trust the dial on the heater itself; a simple glass or digital thermometer placed on the opposite side of the tank will give you a more accurate reading of the overall temperature.

Lighting for Fish and Plants

Lighting is about more than just seeing your fish; it dictates the biological rhythm of the tank. If you plan on keeping live plants, you will need a full-spectrum LED light that provides the specific wavelengths needed for photosynthesis.

For a fish-only setup, basic lighting is fine, but you should still use a timer. Consistency is key—aim for 6 to 8 hours of light per day to prevent excessive algae growth while giving your fish a clear day/night cycle.

Substrate and Hardscape: Creating a Home

The “floor” of your aquarium and the decorations you choose do more than just look pretty. They provide habitat, influence water chemistry, and offer a place for those essential beneficial bacteria to colonize.

Selecting the Right Substrate

If you want a lush, planted tank, an active substrate like aqua-soil is best, as it contains nutrients for root growth. However, for most beginners, inert sand or smooth gravel is a safer and more affordable starting point.

Avoid sharp gravel if you plan on keeping bottom-dwellers like Corydoras or Loaches, as they can damage their delicate barbels (whiskers) on jagged edges. Sand is often the most natural-looking and easiest to keep clean.

Hardscaping with Rocks and Driftwood

Hardscaping refers to the non-living elements like stones and wood. Driftwood not only looks stunning but can also leach beneficial tannins into the water, which have natural antifungal properties and mimic tropical blackwater environments.

When choosing rocks, ensure they are “aquarium safe.” Some rocks, like limestone, can cause your pH to skyrocket, which might be harmful to certain fish. Dragon stone and Seiryu stone are popular choices for creating dramatic underwater landscapes.

Water Chemistry: The Invisible Essentials

You cannot see the most dangerous things in a fish tank. Ammonia and nitrites are invisible, odorless, and deadly. This is why water chemistry tools are among the most vital things you need for a fish tank to remain successful.

Water Conditioner (Dechlorinator)

Tap water is treated with chlorine or chloramines to make it safe for humans, but these chemicals will burn a fish’s gills and kill your beneficial bacteria instantly. You must use a dechlorinator every time you add water to the tank.

Products like Seachem Prime are industry favorites because they not only remove chlorine but also temporarily detoxify ammonia and nitrites during emergencies. Never skip this step—it is the difference between a thriving tank and a disaster.

The Liquid Test Kit

Avoid the paper test strips if possible; they are notoriously inaccurate. A liquid master test kit (like the API Master Test Kit) is the most reliable way to monitor your ammonia, nitrite, nitrate, and pH levels.

During the first few weeks, you should test your water daily to monitor the Nitrogen Cycle. Once the tank is established, weekly testing before your water change is usually sufficient to ensure everything is balanced.

Beneficial Bacteria Starters

While bacteria will eventually grow on their own, using a “bottled bacteria” starter can significantly speed up the cycling process. This helps establish the biological colony needed to process waste before you introduce your first fish.

Maintenance Tools: Making Chores Easier

Aquarium keeping is a hobby of consistency. Having the right tools on hand makes the weekly maintenance routine a breeze rather than a chore you want to avoid.

The Gravel Vacuum and Siphon

A siphon is essential for performing water changes and cleaning the substrate. It uses gravity to pull water out of the tank while you “vacuum” the fish waste and uneaten food out of the gravel or off the surface of the sand.

Aim to change 20-30% of the water every week. This removes nitrates (the end product of the nitrogen cycle) and replenishes essential minerals that fish and plants use up over time.

Algae Scrapers and Magnetic Cleaners

Algae is a natural part of any healthy ecosystem, but it can quickly obscure your view. A magnetic glass cleaner allows you to scrub the inside of the glass without getting your hands wet, making it easy to do a quick “spot clean” every day.

Fish Nets and Buckets

Always have at least two dedicated “aquarium only” buckets. Never use buckets that have held household cleaners or soap, as even a tiny residue of detergent can be fatal to fish. A fine-mesh net is also necessary for safely moving fish or removing floating debris.

The “Aftercare” Kit: Food and Health

Once the tank is running and the water is safe, your focus shifts to the long-term health of your inhabitants. Quality nutrition and a basic medical plan are the final pieces of the puzzle.

High-Quality Nutrition

Not all fish food is created equal. Look for foods where the first few ingredients are whole proteins (like krill, squid, or whole fish meal) rather than “fish meal” or “wheat flour” fillers. A variety of flakes, pellets, and frozen treats like bloodworms will ensure your fish get all the vitamins they need.

A Simple Quarantine Setup

If you plan on expanding your collection, a small 5-gallon “quarantine tank” is a life-saver. By keeping new fish in a separate tank for 2-4 weeks, you ensure they aren’t carrying diseases like Ich or velvet into your main display tank.

Frequently Asked Questions

How much does it cost to get everything I need for a fish tank?

For a basic 20-gallon setup, you can expect to spend between $150 and $300. This includes the tank, stand, filter, heater, light, substrate, and initial water conditioners. Costs can vary significantly based on whether you choose high-end LED lighting or specialized aquascaping materials.

Can I add fish the same day I set up the tank?

No. This is the most common mistake beginners make. A tank needs to go through the “Nitrogen Cycle,” which usually takes 4 to 6 weeks. During this time, beneficial bacteria grow to handle the waste. Adding fish too early often leads to “New Tank Syndrome,” where ammonia levels spike and harm the fish.

What is the easiest fish to keep for a beginner?

Bettas, Guppies, and Platies are excellent choices for beginners. They are hardy, colorful, and relatively easy to feed. If you have a larger tank, Corydoras catfish are wonderful, peaceful additions that help keep the bottom of the tank clean.

How often should I clean my filter?

You should rinse your filter media about once a month. Crucial tip: never rinse your filter sponges in tap water! The chlorine will kill your beneficial bacteria. Always rinse them in a bucket of old tank water that you’ve removed during a water change.

Conclusion

Starting a new aquarium is an incredibly rewarding experience that blends art, science, and nature. By ensuring you have all the things you need for a fish tank before you bring your fish home, you are setting yourself up for a peaceful and thriving hobby.

Remember, the most important “tool” you can have is patience. Take the time to let your tank cycle, research the specific needs of the fish you want, and stick to a regular maintenance schedule. Your fish will reward you with vibrant colors and fascinating behaviors for years to come.

At Aquifarm, we believe that anyone can be a successful aquarist with the right knowledge and a bit of dedication. Welcome to the community—we can’t wait to see the beautiful underwater world you create!