Will my snails be OK?

[PostalPenguin]

My 20g has 4 nerite snails and 1 apple snail. My water is quite hard, has a natural pH of 8.1 which I drop to 6.4 via CO2 injection. Will the snails be OK at a pH of 6.4? The water is quite hard which makes me think yes since they will have plenty of calcium to build their shells with.

[rich311k]

They should be fine. The PH due to CO2 should have little effect on them.

[Northernguy]

Watch out for signs of the shell beginning to to deteriorate.I beleive it starts from the point of the spiral.Make sure you add calcium to their diet as well.