Woodhouse toads new penthouse

[red green hawk]

My Woodhouse toads (don't know if they are Rocky Mountain or southwestern species) will be 2 years old this May/June and were previously in a 20 gallon terrarium. Petsmart had a sale on aquariums. I go a 75 gallon for $90, over $100 less than what they are originally advertised as!!! Here they are...
Here's the setup.
Hopper on the left, Brownie on the right.
Hopper...
Brownie getting ready to take a dip.

So I know toads don't need that much water. They love to swim in it though. My son thinks that they think they are frogs instead of toads. I plan on filling some of that area in, I was thinking about stacking bricks but I need to be careful about what type of brick I put in there. The partition is made out of a 1x6 that was covered with flex tape and it was sealed in with silicone. They have a coconut fiber substrate with a top layer of Reptobark. I'm going to put some things on the dry land part of it also. I made a lid out of some spare lumber I had and purchased some aluminum screen. The kids love it!!! My son, the "real" caregiver, is doing a great job raising his toads. There have been some learning curves but I think we have to healthy, "happy" little Woodhouse Toads.