Instructions
Change the filter in your tank. A proper filtration system prevents bacteria from building up and keeps the pH of the tank neutral, eliminating excess ammonia. Purchase a filtration system that is designed for the size of your tank and do not overpopulate your tank with too many fish.
Do partial water changes on a weekly basis. You need to remove and replace at least 10 to 15 percent of the water in your tank with fresh water. When replacing the water, scrape algae from the sides and bottom of the tank.
Remove leftover food that accumulates at the top of the tank or under or around decorations. The food decays and contributes to the stench in your aquarium.
Take out any dying or dead plants or fish as soon as possible. They harm the balance of your tank and can make an otherwise healthy, pleasant tank turn into a source of putrid smells.
How to Keep Aquariums From Stinking
When deciding which pet to take home from a pet shop, consider how much space and time you'll have to dedicate to your pet. Pets require you to play with them, feed them and keep their living areas clean. Fish are an excellent choice if you don't have ample amounts of time to spend entertaining your pet. They are not a pet that eliminates responsibility completely, however, since you still need to feed them and keep their habitat clean, or you risk having an incredibly smelly tank.