Well, My tanks dimensions are 24"x12"x12" but I have a 30 gal tank for when the terrapins get bigger.
Erm I plan to have a brackish rock pool on the left hand side with a filter and heater In the land part will be built out of the water by siliconed slate. This will be built up with sand and gravel, and will be the basking area with a low wattage heat lamp above it. There will also be a few medium sized rocks here and maybe a few live plants but am not sure what yet as I havn't researched into the plants.
Eventually there will probably be a smalll mister in here and a waterfall made by running a tube from the outlet of the filter over the rocks.
Many thanks matt B.
