I am about to move my two RES into our 160 galon pond outside. I have heard that you should get a pump/filter for multiple times the amount of water if you have turtles. Would a Pondmaster 1500 or 1700 be good? I think the 1500 is about 500 gallons per/hour. This is the only pond system found at our local pet store. Thanks for any help.

And if you have any other advice on pond care for RES that is important, I'd appreciate it. Thanks.