Hi my name is Gwen and I am a newbie here. In my classroom last year I had a 20 gallon community set up. When summer came, I moved all my fish to my home. My principal has a 40 gal hexagonal and needed to do some work on it so moved the 4 or 5 fish she had to mine. It has been set up for a year so it was okay. A couple of the fish were large 4" or so. Anyway, for some reason the fish did not get fed for a few days and some died. She finally set up a new tank and took the other fish out. She turned off my filtration system so it has been off for a week. Sooo...here is the question. I want to reset up the tank but used 2 or 3 clawed frogs instead of fish. I know that the cycle system is important, but do you think it has been disrupted severely if the filtration has been off. Also, since some fish died in there (the two big ones), I am wondering if I should just totally start over. I had planned to drain about 1/2 the water to keep the bacterial in tact. If I do start over, how long should I wait before adding frogs? Thank you.