Well i was just downstairs watching some tv and my sister tells me i had a leak or somethnig in my tank. Apparently, the nylon i put on the bottom of my powerhead got clogged and wouldnt keep the siphon on my overflow box going. So we took that off and now i have nothing to put in there. Sponges were ok but it was hard to get the right size to put in the bottom . The pantyhose i put on it got clogged. Its all good now but i need something to put on the sucking part (or bottom as i reffer it as) so that my fish dont get sucked up, like a previous one did a while back. Please answer me as fast as you can.