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.
Diy vertical aquaponic garden
Aquaponics grow bed diy
Aquaponics vertical grow tower diy
DIY Tankless Inline Water Heater from "Scratch" YouTube
