Sorry, I should put that my GH is 140ppm which is bordering on soft water.
This measurement of calcium & mag. ions is more relevant

"Dave M. Picklyk" wrote in message
news:3YN1d.20763$KU5.20713@edtnps89...
Hi! My snail is losing it's shell and I think it's because of my water
hardness. My KH hovers around 9-10 and my PH is 7-7.2. Since most plants
do prefer harder water, so would calcium carbonate be a good additive for
the water?

THanX!

Dave.