trex1260 wrote:I think i need a new filter, mine is a 90gph Duetto (29 gal tk) but it is not as effective as I would have imagined it to be. Some one said to use an Aquaclear. Can anyone give some more advice on a filter for a 30 gallon with one RES?

The suggested general rule for filter power on this site for RES (Or any related aquatic turtle for that matter) is buy one 3x the rated size of your aquarium. So for a 30 gallon tank, it is best to aim for a filter rated for 90 Gallon tanks or bigger. The only exception, is if your turtle is relatively small and young, high powered filters (such as the larger canister filters, Rena xP3, xP4, Fluval FX5) may not be the best choice, as they could create a strong current in a small tank and suck your turtle in and trap it, drowning it. This is generally not a problem for turtles larger than 3 inches though. The reason for the 3x rule, is that all filters in the box were originally intended for fish, and fish produce less waste, and is only a fraction of the much larger turtle waste. Also turtles never stop shedding skin in the water, and they shed scutes of their shell on a basis, so the recommended capacity on the box of a filter is not accurate for a RES, only for fish. 3x is the general rule of thumb.
Don't be confused with the GPH number with the recommended filter capacity though, they are both different things.
Hey hey hey.