I finally got my hands on a nitrate test kit, and after testing for about 2 weeks, it seems like my philodendrons are removing enough nitrogenous wastes that the nitrates don't ever rise above 2-3.0. Even better, most of my evaporation happens from lava rocks which stick out above the surface of the water, so the mineral deposits just build up on them, outside of the water column, where I can wipe them off with a damp rag. GH/KH haven't gone up at all. Not sure of the exact readings (I'm at work).
Am I missing anything, or can I stop doing water changes?
-J
Am I missing anything, or can I stop doing water changes?
-J