Just wanted to thank everyone who took the time to answer my filter question. My computer has been acting up for the past week and I haven't been able to get online.
I did end up purchasing a Fluval 404. Naturally, I'm amazed going from what I had to that! My turtle (Springer) seems happy with the increased water movement too. We borrowed a 55 gal., but it didn't hold water. So my husband (bless his heart) is all for getting a brand new 75 or 100 gal. so we don't take any chances. Springer is going to be loving life now!
Thanks again-I appreciate the help!