Second Cement Tank New

The second tank has a layer of polyurethane foam, then portland cement applied to the foam. I would have spent more time building out the cement to make it less flat, but with all of the fish from the 120 gallon tank stuck in the 30 gallon sump, I was in a hurry to get it set back up with the new tank. With the polyurethane foam, it would not crack the glass like the first cement tank. You can see the overflow in the back right corner. There is also a natural looking cement floor under the sand.

The left back corner is where the water enters the tank. It shoots up out of the fissures in the rock (portland cement).

You can see the one yellow tang swimming down against the strong force of the water coming up out of the rock (portland cement)