so ive made a small plexi glass tank probablly about 3 or 4 gallons with a built in filter and a ramp with basking dock that i can fill with sand or make as an elevated pool, except theres no way for the water in the pool to reach the filter so i like the sand idea better. Question is now what do i put in it? there is silicone all over the place inside the tank, as it was very messing seeing as it was my first build and i was just playing around. what do you guys think would be good for it?