Originally Posted by Ashlymm
We will definitely get the API test kit. The pet store recommended the strips. They said that's what they use on theirs. We'd like to put fish back in as soon as we can, just don't want them to die. If their is any remaining peroxide, won't that kill the fish? Is 50% water change the norm? I had thought 25. So should we not put any salt in for cichlids?
Skip the salt for cichlids. You should only really use salt if it's to treat an issue with fish.
Hydrogen peroxide breaks down very quickly when exposed to light and air. There's nothing to worry about.
You can easily tailor the water changes to suit your needs. Think of each water change as removing a part of your contaminants For example, if your nitrates are at 100ppm and you do a 50% water change it will drop the nitrates down to 50ppm (Assuming there aren't any nitrates in your tap) But if you do a 25% water change at 100ppm you will only drop it down to 75ppm and then a second 25% water change will drop it down to 57ppm.
Keeping that in mind you can change just as much water as you want to keep things in check, although I generally don't bother with less than 50%.