no one helping you out? not to worry, celaeno is here!
unless you have a pH that declines over time or you want to breed your fish, i wouldn't worry about changing the gH/kH.
here's some information i copied from the api gh/kh test kit:
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KH and GH Conversion Chart
# of Drops dKH ppm KH/GH
1 1 17.9
2 2 35.8
3 3 53.7
4 4 71.6
5 5 89.5
6 6 107.4
7 7 125.3
8 8 143.2
9 9 161.1
10 10 179
11 11 196.9
12 12 214.8
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community tank --> GH/KH 3-6 (50-100ppm)
GH/KH Range Aquarium Life
0-3 discus, arowana, elephantnose, neons, cardinals, live plants
(0-50ppm)
3-6
(50-100ppm) most tropical fish including angelfish, cichlids, tetras, botia, live plants
6-11 most tropical fish including swordtails, guppies, mollies, goldfish
(100-200ppm)
8-12 marine fish and invertebrates
(140-200ppm)
11-22 rife lake cichlids, goldfish, brackish water fish
(200-400ppm)
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