What are you guys using for filtration and let me know your tank size/volume as well? I currently just have a standard 20 gallon with a single painted hatchling, that I try my best to feed out of the tank. I'm using a tetra whisper 40i. I just went with this because it was cheap and the most powerful on Amazon like $12.00 and I know will have to upgrade again when I upgrade the tank. I also have the 20I in my 10 gallon snail tank and I figured temporarily I could use both if needed if one doesn't suffice. So far so good though, water seems clear. (Sadly my dwarf puffer died unexpectedly today) so ....if I don't continue breeding snails or get another DP that second filter will be free for a back up. I'm just curious, I know a lot of people with mature turtles use canister filters...I have no experience with them whatsoever.