It's a Red Eared Slider. I don't have the money right this minute, so he's still stuck in a 30 gallon tank. But, we usually get him in a kiddie pool over the weekends. He's just gotten so much bigger and messier....I've gotta do something. Money is tight as my wife has Multiple Sclerosis, so we have medical bills out the wazzoooo. I figured to get the right size for him, the DIY plywood would be the most economical. What do you guys suggest for a filter for this thing? I have a magnum 350 set up now, but it seems to get clogged so quickly and the flow is really reduced within a week.