its the filter b4 the pump...i have a pre filter at the skimmer box..then a poly pad filter above the bio balls.. what i wanted to do is remove that last filter sponge and fill the bottom woth live rock rubble and cheto and i would put a divider at the pump so the cheto wouldnt get sucked into the pump
I will send a pic tonight. Also check out my thanks to swf members post. I have a pic on there that shows it but its not a great pic. But you will get the idea.