Planted Tank Enthusiast
Join Date: Oct 2011
Location: Blaine, Minnesota
I use a dehumidifier all summer long to do my water changes, this works great! When I first bought this unit, I let it run 1 summer so the copper / zinc / everything could oxidize and/or rinse out. That first year, all the water went down the drain. Then the 2nd year I was brave enough to use the water in my planted tank.
The only thing to be aware of is that it's literally 0deg hardness and 0deg Kh. I always add in some potassium carbonate so my Ph doesn't crash from the CO2 injection. I also mix in about 20% tap water to get the Gh up to a little more reasonable level.
As for microbes . . . Just remember that most tropical fish / plants normally live in malaria and disease infested jungle. I'm pretty sure the stuff growing in your dehumidifier is pretty tame compared to a jungle river.
Last edited by proaudio55; 11-04-2011 at 07:15 PM.