Basically I learned that when I bought my 29 gal. starter kit from Wal-Mart it came with a Regent filter. I was told that I needed a bio-wheel with my filter. I go out, purchase a Penguin 170, hook it up and realize that the Penguin and my Regent are the exact same filters minus the bio-wheel on the Regent. If I would have waited and been patient, I would have saved about 20 bucks by just buying a bio-wheel and brackets for my Regent. Just thought you should know.
Charlie
Charlie