i have a 6 year old, 40 lb sulcata who lives outside. He has a heated house, plenty of shade, digs a burrow every summer and has a soaking pond. The pond is approx 8x10 and about 8 inches at the deepest point. We have a pump, filter, waterfall and pond liner. Now for the problem! I can’t keep the pond clean! It stays full of dirt and poop! I scoop the poop out daily but the poop that disintegrates before I get it scooped out gets sucked into the filter and clogs it! I’m wondering if a cement pond would be easier to maintain? Maybe one not so big and no pump or anything, just fill wth water and dirty water could be sprayed out daily! I guess my question would be how thick should concrete be and would it require using rebar? Any and all suggestions would be greatly appreciated!