Yesterday afternoon, I went to look at a 75g tank that was for sale in our local paper. I'm pretty sure I'm going to buy it. It's complete with the stand and everything needed to set it up. It has two Penguin filters with it. I've heard of Penguin filters, but I've never used one (I have AquaClears on my gf tank). Are the Penguins good filters? What would I need to get to put in it? Do they use sponges or what?
Advice please???