allaboutfish
Aquarium Advice Addict
he's thinking of when your done cycling right now you wanna decrease ammonia as in if you have 4ppm then a 50% water chage brings it to 2ppm and then another 50% brings that to 1ppm ad so on and you have to have it at .25 or lower or it can cause ammonia burns. and your lucky my petco didnt eve have the api master kit im about to order it