hi, this question has bothered me for a long time, basically right now how the filtration works is, i have a pump at bottom of the tank (not in sump but in the actual tank) which will blow the wastes in to the sump before it even gets to the bottom, but now i am thinking about putting stingray and just thin layer of natural gravel at bottom, the pump does 3300L/hr which i've tried and has blown the gravel all the way to the sump, and if a stingray was in there it wouldn't settle down, so my question is, how would i clean my tank with out the pump at bottom of the fish tank? or it wouldn't bother the stingray at all if there was that much water flow? please help! 


if my bad english confuses you please ask what part you don't understand and i will be more then glad to explain it! thanks



if my bad english confuses you please ask what part you don't understand and i will be more then glad to explain it! thanks

