brown_thumb
Active member
If I use a propane tankless (on demand) water heater to add CO2 to my grow, I'll need to recycle the water. My home is all electric but I could run a small heater on a propane tank. Is it feasible to use a high-volume water pump to feed the heater from a cattle water tank with the heated water recirculated back to the tank? Evaporation could keep the water cool enough and it could be outside the grow room/greenhouse... outdoors. A float valve could be added to keep the tank full. Of course a water treatment regimen would be needed to prevent algae growth, mosquito larvae, etc. The goal is to add CO2 without overheating the grow room.
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