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I was looking at some messages on The Krib, and noticed a breakdown of
GH readings, and was surpised that my 7 degrees GH is considered soft.
My GH is 7 degrees, and my KH is 3 degrees. Is there any reason for me
to mess with the hardness? I'm keeping mostly rainbows, with a variety
of algae eaters and assorted catfish roaming the bottom.
I thought that my hardness was increasing, but either is was simply due
to skipping a water change, or maybe I screwed up the test. I do get
a lot of evaporation, which I believe can result in increasing hardness
if water changes aren't done.