I'd like to trade for or buy an in tank filter, preferably a Whisper 20i, 30i, or 40i. I have a situation where my tank at work is bumped up against a wall and I can't scoot it out because it will eat up too much desk space, so I need an in-tank filter. I'd like to over filter a bit so larger is better. It's a 20 long but I have a puffer in it so he's messy.
I have decor, food, possibly a heater, etc that I can trade for the filter. Thanks.