Scottyhorse
Aquarium Advice Addict
Sounds like a really neat idea, but I do have one question for you..... With the smaller seahorse section, you say you want to maintain a different temperature, but how are you going to handle heat transfer through the glass in order to keep them cooler (assuming you want cooler)? Unless you run a chiller, or double pane the divider for an air-gap insulation, the smaller section will equalize temperature with the larger volume around it.
I was thinking of putting a fan over the top, but making a double pane divider would work well also.. How far apart should I put the panes? 1/2 inch?