Stocking Fish in your Tank


Stocking your fish tank


Cycling your tank

Once you have your fish tank set up you need to start the Nitrogen cycle going in the tank.  All new tanks need to establish a cycle to be able to provide a healthy living environment for the fish.  

What is the Nitrogen cycle?

Fish excrete Ammonia into the water and this is toxic.  Nitrifying bacteria need to build up in the tank to convert the Ammonia into Nitrite (which is also toxic to fish). As different sorts of bacteria begin to grow in the tank the Nitrite is then converted to more harmless Nitrates.  

Fishless Cycling

We recommend Fishless Cycling which is done with the aid of products that help you to start the Nitrogen cycle without adding fish:  

You can check to see if your tank has cycled successfully with testing kits that measure the Ammonia, Nitrite and Nitrate levels in the water.

Visit our fish Products section for a range of water treatments and conditioners

Hardy fish 

Once your tank has stabilised you can start building your community of fish gradually, adding a few at a time.  This way the bacteria in the tank can adjust to the changes and the balance is not upset or overloaded.  There are a few hardy fish which we can recommend to start off with that will tolerate higher amounts of toxins in the tank such as Danios and Mollies.  Our staff will be able to give you accurate advice tailored to your needs in store.

View our Types of Fish section to learn more

Stocking your tank

You'll need to make sure that the types of fish you have chosen will get along with each other.  Certain types of fish can attack other fish and our staff will be very happy to give you advice about which fish are compatible with each other in store.  

Tropical fish

One good tip is to choose fish that swim at different levels of the tank, which makes the most of the space available and also gives a good display.

Cold Water fish

Some fancy goldfish are slow swimmers and should not be mixed with other goldfish varieties that are fast and agile as they will have a hard time competing for food:

Smaller fish such as the White Cloud Mountain Minnow and the Danios are best kept in schools of 6 or more. Fully grown fast swimming Goldfish will eat smaller fish like the Minnows and Danios so we do not recommend keeping them together.

View our Types of Fish section to learn more


How to add fish to your tank

When you buy your fish, they will be netted and put into a plastic bag, with a little water from their tank.


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