So I got 2 new frogs today and currently they are in a small critter container that is about 3 gallons. I don't have a filter, but I will be doing daily water changes. So, should I be doing 50% or full water changes daily? Also, I tested my water in my 5.5 gallon tank that I have been doing daily 50% water changes with and it had about 3.0 ppm nitrites, almost zero ammonia, and no nitrates. I then did a 50% water change. Do you guys think nitrates will appear soon?