Steph writes: << Coz my tap water is very soft this tank measures out at 6.2dH even with clam > shells and other sundry rocks - most of which have fossils in them (Dave did > invertebrate paleotology at uni) The pH normally sits about 6.8 - 7. Is this too > hard or neutral for the kribs to breed successfully? >> I'm not a pro on West Africans, but my thought would be that 4.0dH would be a little better. A pH of 6.8 is probably marginal, but okay. Bob