Well, excellent then! My water is RO water reconstituted to a medium soft hardness. I have yet to figure out the KH, but I am guessing it is inline with the GH, considering I use RO right, which I would think would do a pretty good job of balancing the KH and GH. Hmm....I probably should order a KH test kit though, just to make sure.
As far as the R. Macrandra, it just kindof turned black and the lower stems melted away, just leaving the tips of the plant. I have about 3.6 WPG in that tank. Maybe I should up that a little more, but to this point I haven't seen a reason to do so. Maybe it is just having problems because my tank is still getting established.
Two 1 GA desktops, a 5 gallon, a 2.5 gallon, a 10 gallon, a 20 gallon, a 25 gallon, and two 75 gallon tanks, all planted.
I am an expert on algae, so ask me if you have questions. I know how to grow it, just not how to get rid of it.