I just upgraded my RES from a 10 gallon to a 30 gallon. she is about 5 inches, but the 50 was just way too big for my apartment.
The 30 is so big, she looks so little in it. I think she will be much happier, already in less than 24 hours she seems to be more active and less weery of every little bump and movement.
So, it is a lot deeper, the water. I have a nice basking area, which she already used today.
my question, since the water is about 12 inches deep, can I use a cinder block in the tank? One of those 8x8 halves so that she has a place where she can sit under the water and poke her head out? (she likes to do that).
I found that trying to pile rocks was way too unstable, and put risk on the rocks falling, possibly breaking the tank.
I think the cinder block would be a good solution, square and rigid, it wont move. Wile at the same time its weight is no more than rocks.
do you see any problem with this?

