Dear Cory,
Thank you for showing videos. I saw your video you posted regarding sponge filters, and a tour of your tanks in the store. You mentioned in the video that you had 2 sponge filters in a 125 gallon, with a lot of fish in it. I used to be so afraid of sponge filters thinking that I would end up with ammonia because I didn't believe the surface area was enough to handle the ammonia. I saw your 20 gallon tanks with one sponge filter housing more fish then i do in my 15 gallon. I only have 12. I'm no longer afraid of them, and am confident that it will be more then enough biological filtration for my 12 fish in my 15 gallon.
