This ParlaScrubber provides an easy way to transfer heat to your aquarium via Light. It is not very efficient but in a pinch it adds a little heat to your aquarium water.
still in development. Presently my prototype is working great but I have to clean nuisance algae from the mesh approximately every week or it clogs the heater.
The top hole, or water inlet, is 3/8" NPT tapped to provide an optimal number of connection possibilities. a 3/8" barb end is included.
The bottom hole, or drain, is 1/2" npt tapped and a 1/2" threaded output male-male adapter is provided.
Mesh insert is provided for the algae to grow on.
This is designed to work with many available 8.5"L x 7.5"W x 1"H COB style LED fixtures like this: