When cleaning goldfish aquarium exchange only a portion of the water
A health ecosystem contains living organisms that make the water safe for fish to live in. Goldfish create a lot of waste which creates ammonia, a dangerous and deadly toxin. When ammonia is present, friendly bacteria form to feed on the toxin, converting it to nitrites, and then nitrates. We call this even the nitrogen cycle. Goldfish have no tolerance for ammonia and nitrites, although, they can tolerate nitrates at low levels. Cleaning goldfish aquarium should consist of dumping and replacing all of the tank water
When only nitrates are present, algae forms to feed on the toxin, keeping levels at bay. Most goldfish keepers think of algae as grunge, but it’s really very beneficial. Algae reduces our work load by reducing water changes
We exchange water in order to keep nitrates low, and reduce the amount of utilized waste in the water
Partial water change
Exchange only a portion of your fish house water. Perform the task consistently by exchanging small amounts often, instead of large amount less often