Planted Tank Guru
Join Date: Nov 2005
Location: Saint Joseph, Illinois
I tried to collect rain water, but it ran off all yellow and was filled with scum. Funny because my gutters are clean. I usually buy distilled water since I pretty much never change my water and use it only to top off my open tops (and no R/O, either). With a very light fish load and lots of plants, it can be done. Wal-Mart (If you aren't boycotting them because of their deplorable fish conditions) has distilled water for 68 cents a gallon, and they come in convenient three packs. During the winter I just collect a bunch of freshly fallen snow.