If you ever have rising temperature on your small tank and cant afford to have chiller, try Donjoy Iceman. I have 34g Solana and thats what I use, could be temporary until i could afford another chiller. Put the pad on the sump and control the output for temp. If it doesnt leach and chemical ( from rubber pads) then It will be permanent. Economical and you just need an ice cubes. Ebay is the right place to shop.