Saltwater Fish Stocking Calculator

Saltwater Fish Species	Maximum Size (inches)	Recommended Minimum Tank Size (gallons)
Clownfish	4-5	20
Blue Tang	12	75
Goby	3-4	10
Damselfish	3-4	20
Angelfish	6-12	55
Wrasse	4-6	30
Blenny	4-6	30
Triggerfish	8-12	100
Butterflyfish	4-8	50
Surgeonfish	8-16	100

FAQs

How many fish can you put in a 100-gallon saltwater tank?

The number of fish that can be put in a 100-gallon saltwater tank depends on the fish species, their sizes, and their territorial behavior. As a general guideline, you can follow the rule of 1 inch of fish per 30 gallons of tank size. So, in a 100-gallon tank, you could have around 3 to 4 fish that are each 3 inches long on average.

How many fish can you put in a 75-gallon saltwater tank?

Following the same rule, in a 75-gallon saltwater tank, you could have around 2 to 3 fish that are each 3 inches long on average.

How many fish can I put in a 50-gallon saltwater tank?

For a 50-gallon saltwater tank, you could have around 1 to 2 fish that are each 3 inches long on average.

How many fish can you put in a 30-gallon saltwater tank?

In a 30-gallon saltwater tank, you should aim for around 1 fish that is 2-3 inches long.

How many fish can you put in a 120-gallon reef tank?

For a 120-gallon reef tank, you could have around 4 to 5 fish that are each 3 inches long on average.

How many saltwater fish can I put in a 55-gallon tank?

In a 55-gallon saltwater tank, you could have around 2 to 3 fish that are each 3 inches long on average.

How many tangs in a 75-gallon tank?

It’s generally not recommended to keep tangs in a 75-gallon tank due to their active swimming behavior and large size. Tangs require a more spacious aquarium to thrive. A tank size of at least 100 gallons or more is more suitable for most tang species.

How often should you do a water change on a 75-gallon saltwater tank?

For a 75-gallon saltwater tank, performing a water change of about 10-20% every 2 to 4 weeks is a good practice. However, the frequency may vary depending on the tank’s bioload, water parameters, and the types of filtration and maintenance routine you follow.

How many clownfish can you have in a 75-gallon tank?

In a 75-gallon tank, you could keep 2 to 3 clownfish. It’s best to avoid keeping multiple pairs of clownfish in the same tank to reduce territorial issues.

What saltwater fish can go in a 55-gallon tank?

Some suitable saltwater fish for a 55-gallon tank include clownfish, gobies, firefish, royal gramma, and some smaller wrasses. Always research the specific fish species’ requirements before adding them to your tank.

How many fish can you put in a 60-gallon saltwater tank?

In a 60-gallon saltwater tank, you could have around 2 to 3 fish that are each 3 inches long on average.

How many fish can you put in a 70-gallon tank?

For a 70-gallon tank, you could have around 2 to 3 fish that are each 3 inches long on average.

Can you add too many fish at once to a reef tank?

Adding too many fish at once to a reef tank can overwhelm the biological filtration and cause ammonia and nitrite spikes, which are harmful to fish and corals. It’s best to add fish gradually over time to allow the tank’s biological filtration to adjust and handle the increased bioload.

Are saltwater fish tanks hard to maintain?

Saltwater fish tanks can be more challenging to maintain compared to freshwater tanks due to the need for stable water parameters and the complexity of maintaining a marine ecosystem. However, with proper research, equipment, and regular maintenance, they can be rewarding and successful.

Should I add coral or fish first?

In a new reef tank, it’s generally recommended to establish stable water parameters and a healthy biological filtration system before adding corals. After the tank has been cycled and stable for some time, you can start adding corals. Fish can be added after the corals, once the tank is fully established.

What is considered heavy bioload in a reef tank?

A heavy bioload in a reef tank refers to having a high number of fish, particularly larger ones, or a significant number of corals that produce a lot of waste. High bioload can lead to increased nutrient levels, which may result in water quality issues if not adequately managed.

How many fish can you put in a 200-gallon tank?

In a 200-gallon tank, you could have around 6 to 8 fish that are each 3 inches long on average.

How many fish can you put in a 150-gallon tank?

For a 150-gallon tank, you could have around 5 to 6 fish that are each 3 inches long on average.

How many angelfish can you have in a 55-gallon tank?

Angelfish require more space due to their active swimming behavior and territorial nature. It’s best to keep only one angelfish in a 55-gallon tank.

What is the best size tank for saltwater fish?

The best size tank for saltwater fish depends on the specific species you want to keep. Generally, larger tanks provide more stable water conditions and more swimming space for the fish. A tank size of at least 75 gallons is a good starting point for keeping a variety of saltwater fish.

How long does it take to cycle a 55-gallon saltwater tank?

The cycling process in a saltwater tank can take 4 to 8 weeks on average, depending on various factors such as the source of live rock or live sand, the presence of beneficial bacteria, and the ammonia source used during the cycle.

Can you keep a yellow tang in a 60-gallon tank?

Yellow tangs are active swimmers and require a tank with plenty of swimming space. A 60-gallon tank is generally considered too small for a yellow tang. A tank size of at least 100 gallons or more is recommended for keeping a yellow tang.

Can you keep a yellow tang in a 75-gallon tank?

While a 75-gallon tank is larger than a 60-gallon tank, it is still not an ideal size for a yellow tang. Yellow tangs should ideally be kept in tanks of 100 gallons or more to accommodate their swimming behavior.

Can you keep a blue tang in a 75-gallon tank?

Blue tangs (also known as Dory from “Finding Nemo”) grow quite large and are very active swimmers. A 75-gallon tank is generally considered too small for a blue tang. A tank size of 180 gallons or more is recommended for keeping a blue tang.

Do I need to add salt every water change?

No, you do not need to add salt every water change in a saltwater tank. When performing a water change, you replace the removed water with new saltwater that matches the salinity of the existing tank water. Only top-off water (evaporation replacement) should be added with freshwater, and the saltwater concentration should be checked and adjusted as needed periodically.

Are bigger saltwater tanks easier to maintain?

In general, bigger saltwater tanks can be somewhat easier to maintain than smaller tanks due to their higher water volume, which provides more stability and dilution of waste. However, larger tanks can also be more challenging in terms of initial setup and water changes due to their size and weight.

Can you do a 100 percent water change in my fish tank?

Doing a 100 percent water change is generally not recommended for established tanks because it can disrupt the tank’s beneficial bacteria population and cause stress to the fish and other inhabitants. Partial water changes of around 10-20% are typically more beneficial and safer for the tank’s overall health.

What size tank is best for 2 clownfish?

A 30-gallon tank or larger would be suitable for keeping 2 clownfish. They are relatively small and can do well in moderately-sized aquariums.

How much water does 1 clownfish need?

One clownfish would require at least a 10-gallon tank, but providing more space, such as a 20-gallon or 30-gallon tank, would be better for the fish’s well-being.

What is the maximum size of a Red Sea clownfish?

Red Sea clownfish (Amphiprion bicinctus) can grow up to 3 to 4 inches in length.

What is the easiest size saltwater aquarium?

A 20 to 30-gallon saltwater aquarium is often considered one of the easiest sizes for beginners to manage. It provides enough space to keep a few small fish and some hardy corals while still being manageable in terms of maintenance.

What size saltwater tank do angelfish need?

Angelfish require a larger tank to accommodate their size and swimming behavior. For most angelfish species, a tank size of 75 gallons or more is recommended.

How much does it cost to maintain a 55-gallon saltwater tank?

The cost of maintaining a 55-gallon saltwater tank can vary based on factors such as electricity rates, fish and coral choices, and equipment costs. On average, it could cost between $50 to $100 per month for ongoing expenses like electricity, salt mix, food, and supplements.

How many clownfish can you have in a 65-gallon tank?

In a 65-gallon tank, you could have around 2 to 3 clownfish.

How many fish can you put in an 80-gallon tank?

For an 80-gallon tank, you could have around 3 to 4 fish that are each 3 inches long on average.

How many gallons per hour does a saltwater tank hold?

The number of gallons per hour (GPH) a saltwater tank holds depends on the flow rate of the aquarium’s filtration system, return pumps, and powerheads. It’s recommended to have a total turnover rate of 10 to 20 times the tank’s volume per hour for efficient filtration and circulation.

How many angelfish can you have in a 75-gallon tank?

For a 75-gallon tank, it’s best to keep only one angelfish due to their territorial nature and the need for sufficient space to swim.

What are good fish for a 75-gallon tank?

Some good fish options for a 75-gallon tank include clownfish, gobies, wrasses, royal grammas, and small tangs (e.g., kole tang). Always research the specific fish species’ requirements and compatibility before adding them to your tank.

How often do you need to clean a 75-gallon fish tank?

The frequency of cleaning a 75-gallon fish tank depends on the tank’s bioload, the type of filtration, and the maintenance routine. Generally, performing partial water changes every 2 to 4 weeks and cleaning the filter media regularly are essential maintenance tasks.

Can you overfeed reef roids?

Yes, overfeeding reef roids or any other fish food can lead to an excess of nutrients in the water, potentially causing water quality issues like high nutrient levels and algae growth. It’s essential to feed fish and corals in moderation.

Can I add more fish after 3 days?

Adding more fish after just 3 days is generally not recommended. It’s crucial to allow the tank to establish stable water parameters and a healthy nitrogen cycle before adding more fish. Typically, it’s better to wait for several weeks or more, depending on the tank’s cycling progress.

How many times a day should I feed my reef fish?

Feeding reef fish once or twice a day is generally sufficient. It’s important not to overfeed, as excess food can lead to water quality issues.

How often should you top off a saltwater tank?

Top-off (adding freshwater to compensate for evaporation) should be done regularly, possibly daily or every few days, depending on the tank’s evaporation rate. Maintaining stable water levels is crucial for the health of the tank’s inhabitants.

What are the cons of a saltwater tank?

The cons of a saltwater tank include higher costs, increased complexity in maintaining stable water parameters, potential challenges with some fish and corals’ compatibility, and the need for more equipment compared to freshwater tanks.

What is the first fish to add to a reef tank?

Hardy and peaceful fish, such as some species of clownfish or damsels, are often recommended as the first fish to add to a reef tank. They can help establish the tank’s biological filter and adapt to the new environment more easily.

How do you cycle a saltwater tank fast?

To cycle a saltwater tank quickly, you can use live rock and live sand from established tanks or use products that contain beneficial bacteria to jumpstart the process. Additionally, adding a small amount of pure ammonia can help establish the nitrogen cycle more rapidly.

Why add crushed coral to the aquarium?

Crushed coral is added to the aquarium as a substrate to maintain stable and elevated pH levels. It can also provide a buffer to help resist pH swings caused by acidification.

How long should you wait to put fish in a saltwater tank?

You should wait until the nitrogen cycle is complete and stable water parameters are established before adding fish to a saltwater tank. This typically takes around 4 to 8 weeks, depending on the tank’s setup and conditions.