Originally Posted by JKfish
If I were to try and cycle a divided 10 gallon with 2 males who have some fin damage due to tail biting how often would I have to do water changes? I remember reading something like 25% daily and 50 precent once a week, is that correct?
In a 10g filtered with 2 adult bettas-fish-in cycling-without water testing-I would make one 50% water only change a week and one 50% with gravel vacuum a week-this is based on-not over feeding and removal of uneaten food
If you have water testing products for ammonia, nitrite, nitrate-test the water daily and with any reading of ammonia or nitrite 0.25ppm or greater make a 50% water only change.
Any time the fish have any behavior changes or acting odd-make a 50% water only change even if you just did one earlier-especially if you don't have anyway to test the water at home.
The nitrifying bacteria are sticking and adhere to everything in the tank, in the top layer of the substrate and in the filter media-very little are in the water column...so water only changes will not slow the nitrogen cycle, however, over cleaning the substrate and filter media can.
Once you have nitrate of 5-10ppm and 0ppm on ammonia/nitrite for several days without water changes-you are most likely cycled-this can take 4-8 weeks, also, you want to monitor the the water prams daily for another month and if stable, weekly water test before your regular weekly water change.