That's actually sand substrate, but I don't know if I like it because my pleco will bury waste in it it seems like.. Or maybe It just gets kicked up and into the filter idk for sure the sand is relatively new. Yes, the rescue turtle will have his own tank. I might have to move him into the bigger tank for feeding though because I feel his filter won't be sufficient. The tank is only 20 gallons and has a filter fit for a 50 gallon but I still don't trust it

. He's much smaller than my RES and much older too so I don't know how they'll get along. I'm going to get him tomorrow, I'll see how he does with a tank buddy.