Oh wait I just thought of something:

Hydro res pH=5.5
Guess what, you're going to get copper dissolving off the tube into the water.
Excess copper=multinutrient lockout=dead plants.
You have to use stainless.
stinkyattic Reviewed by stinkyattic on . CO2 for Rez Cooling and Enrichment? I am an offroad enthusiast, so I was filling up some tires this weekend with a CO2 tank on the trail. The air line and tank get very very cold when you use them. Yet not very much CO2 is really used either to get it cold. A short burst is enough to almost freeze a plastic line. So could this be utilized to cool a res? More specifically, could you utilize the natural lower temps of CO2 to lower resevoirs temps AND benefit from CO2 enrichment as well? What about just running some copper Rating: 5