OoOo... ok. that's a little bit different from my initial idea of a sump/ eco-system for a freshwater tank.
i know when i first thought of the idea of a sump filter, i was talking with reefman, so my idea of it was kind of like a saltwater wet/dry sump, and instead of the protein skimmer in the picture of that one i was looking at, the trickle thing was there, and in the second compartment, was i think some type of sand substrate with freshwater plants growing... like grassy stuff or something, and then it went into the third compartment which i think had the pump that pumped the water back into the aquarium. kind of like a refugium except for freshwater... so reefman called it a "eco-system" type sump instead of a refugium.
haha so is the thing i'm thinking about even possible? or would it be easier to just get a bio-media filled sump?
thanks for the help rick!