Originally Posted by not-pro
Does something exist? I would thing a constant cycle would be healthier for fish than changing the water (half the water seems fairly sudden). Not because I'm lazy, but just curious if anything exists or coming down the pipe.
There is not enough beneficial bacteria in the water column to affect the cycle. Most of your bacteria resides in your filter. Doing regular water changes is a must in order to get rid of the waste that gathers in a static environment. If these fish were out in the wild, they would have tons of live plants and organisms helping break down waste, including evaporation and regular rainfall to help prevent an overflow of waste.
There are products that help neutralize ammonia, nitrites, and nitrates, but they are NOT a permanent solution and using too much of it can cause problems, particularly in a new tank.