07-14-2011, 10:15 AM
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That's quite good. GH is around 9 dGH (149 ppm) and KH (alkalinity) is around 4 dKH (68 ppm). That gives you medium hard water. The KH buffers the pH a bit, but at that low a level the pH will lower naturally (below 7) as the tank matures.
You are good with soft water fish. Characins (tetra, hatchetfish, pencilfish), Cyprinids (rasbora, danio, barbs), most catfish, gourami, dwarf cichlids, etc. Avoid livebearers and rift lake cichlids that need harder water. Live plants will do well.
Byron.
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