Help: Cool off tank

[Beverly]

When I had my 28g sub-tropical seahorse tank last summer, I absolutely had to keep tank temps below 76F. Even though we have AC in the rooms where our tanks are, sometimes the temp would edge up to 76F.

Knowing there would be days when I wouldn't get the AC on in time, I always had SW ice cubes stored in a container in the freezer. I'd drop in a couple of dozen small cubes into the tank and in 10 minutes, the temp would drop a degree or so.

Without a sump, you could add larger cubes of SW ice (say, medium yogurt container size) to the tank every so often to slowly bring down tank temps along with the fan system you have set up.