hardness

Hi, My water even after the RO/DI filtering has 15-16 kh/DH I tested it after adding salt before the water change, in the aquarium its a bit lower about 14-15. How do other people deal with this issue without lowering the pH in the tank? I've got my tank for about 6 months and had my nem for...

hi? everyone~ very sad that there is a problem with my fish tank. Recently, the hermit crabs I was raising died one after another. The hermit crab I raised was called “Pagurus minutus Hess” Personally, I suspect that the death of hermit crabs is due to the hardness of sea water. The...