Web another option is utilizing an inline water heater, which can be installed in the plumbing system and automatically heats the water as it flows through. Web joey (king of diy) has a good video on an inline heater setup.
Inexpensive diy aquaponics plant containers
Diy plans and tips for an aquaponics system
Aquaponic betta fish diy mason
DIY Aquarium InLine Heater Instructions YouTube
