Well like you have all told me to start weekly syphoning and as RobD suggested 4 weeks of 25% syphoing and see how it goes. I have been doing the 25% weekly syphons and I am on my 3rd week. Everything is looking GREAT!! And even the fry in the 20 gal L are doing GREAT!! I am SO happy! I think it must have been something in the gravel! Any other suggestions? Thanks!