Avoid mixing the old bag water with the new tank water-you can't be sure what kinds of parasites you have brought home in the bag. If you're planning on having several fish in the tank, don't overcrowd them when starting out. You can add fish to the tank at a rate of one to two fish every one to two weeks. Try not to have more than one inch of fish per gallon of water, and be sure to research the fish you're placing together so they don't eat each other at the first opportunity. Cleaning conditions Fish get used to the condition of the water they are living in.
Good bacteria breaks down waste and toxins such as ammonia into relatively harmless nitrates.
It needs time to grow so it can effectively clean the toxins in the tank. Never use soap of any kind when you clean Wanda's home. Although detergents are great for human habitats, Wanda will show her displeasure by floating belly up. After removing the water, replace it with dechlorinated water the same temperature as the water in the tank. Whether you will want to invest in a heater depends on where you live and what types of fish you have.