TKByrnes
New member
what angle should i have at the end of my return pipe. a 45* or 90* a 90 would spray more across the top but a 45 would hit the rocks more. i dont know what would be best. im worried that if i put a 45 it will blow the sand away from the bottom of my tank. i am flowing about 450 gph in a 75 gal. what do all of you think?