I thought my tank was cycled but now I added my 3 female bettas (5gal tank) and now i have .25 ammonia. how much water should I change and how often to keep the ammonia levels down?
The bacteria colonies have to grow to match the new ammonia output. Change the water as often as nessecary to keep the ammonia as low as reasonably possible. 3 bettas in a 5 gallon seems like a tight squeeze.