Just a heads up if you are looking to improve your filter material, I have had a super bait tank for about 20 years and have tried everything from sponge to polyfil to quilt batting to cotton balls for filters.
Awhile back I got some material from TNKen, a moderator here and a really good guy, that is the best by far I have ever used.
Material is tough, filters really good, cleans easily with a water hose and lasts seemingly forever. I am really pleased with it and just wanted to help anyone looking to improve their results. Just my opinion. Good fishin, possum 1