20-50% change each week should do? I clean my aquarium about every 2 weeks- 1 1/2 weeks, but i have an under gravel filter, a top filter, and live plants in my aquarium. My frogs, have fake plants, and Im getting the filter thing worked out atm. Im trying to get a small one working in it, i just need to find the little carbon sheet things for it.

Im more aquarium person, as I said frogs are completely new to me. I really want to get to know about them, Like I know fish.

Also, How will I know when hes ok to go back in? How will I know his fungus/bacteria/illness or w/e is gone? I know that organisms can seem fine, but still be contagious and/or not feel well. What should I look for to know when to reintroduce him? I dont want to make mr.chives sick too!

(btw my frogs are mr.chives and mr.sage, sage is the ill one)