The guy at my hydro store advised i have a pathogen or bug of some kind...i have scrapped everything and will change out everything that is expendable including the pump...all i will have left is the res and the flood tray ...all the fittings and hoses will be replaced too...any other suggestions of how to clean and sterilize so the problem doesn't come back ...?..it actually looked like it had started clearing up but ...i didn't wanna take any chances ...my first 2 grows were phenomenal...