I have a crappy gravel vac and its still leaving my sand kinda gross looking. Lately i've been noticing a green tinge on the top layer...i'm only guessing that its algae growth? I've been trying to mix it up a bit with my fingers and holding the vac a little closer. but its not helping much. And i'm not sure how much the oto's will eat the algae off the sand. Anyway I have two questions. Do you think its the lack of suction power and things not getting pulled off the sand? Also...how do the pythons compare suction wise to a regular manual gravel vac?

Anyone else have this problem with their sand?