Filter media

I'm just gathering some idea of the choice of media we use in your tanks. I'm planning of doing a Diy sump for my 90 gallon as three filter is not enough for the amount of fish I have in there. Please post of what you have been using and why is it better than your regular old cartridge.

Neo I've Been debating the use of an diy overhead sump by diy king as he calls his self. I've tried a smaller version but it does look tacky on top an a bother to move for cleaning I used ruffed up ping pong balls with four cc of water injected in a 12 inch flower pot square it worked well for the 29 but removing an doing cleaning was a little to much.

cut down on the number of fish more water changes

I was asking what kind of filter media we use like ceramic, bio ball, fluidized bed, lava rock and etc.