Join Date: Oct 2006
Location: Leesburg Virginia
GH = 4 drops means your water is soft, not so much calcium and magnesium
KH = 6 drops means your carbonate hardness or buffering capacity is a bit higher
PH = 7.4 is related to KH meaning buffering capacity raises PH or alkalinity.
Lower GH is good for fish that live in the Amazon, Rio Negro, Orinoco etc. Examples being Cardinal Tetras, German Blue Rams, Discus etc.
KH being higher means your PH will tend to stay constant.
If nitrates and phosphates aren't to high, it looks like you have good water for Planted Tanks.