I am going to be moving my 20 gallon community planted tank to my old 30 gallon soon. I would love to make it into a sort of Paludarium. These are the tanks that are half in and half out of water. My plan is to fill it about 3/4th of the way then have tree roots coming out of the water and putting regular vine plants going into it, their roots.
This is what I mean: http://www.paludariums.net/pictures3.php
http://wet.biggiantnerds.com/logs/image ... 120708.jpg
My question is, how would you filter a tank like this? All I have are HOB filters and when you take the water level down 20-30% they stop working. Anyone have any ideas? I don't want to go with a sponge filter because I will be putting all my fish in there and need something to pull the crap out.