Its not really low pH that would be the issue but low general hardness (GH
) or more specifically the calcium that makes up part of GH
. It is generally true that high pH and high GH
go together, but not always as it would depend specifically on what is raising your pH. Its also true that a high GH
would often indicate high calcium, but again not always as magnesium also contributes GH
If you really wanted to go into testing parameters to see if there is an issue for your snails shell building, then testing for GH
would be more useful than testing pH, and testing for calcium more useful still than testing for GH
If you think you have an issue, then either putting some cuttlefish bone in your tank or filter will give a reliable source of calcium for your snail, or some crushed coral in a media bag in your filter will do the same. Both can just be left there until it disolves over a period of months or even years without worrying about how much of a tums tablet to add in with every water change. Or feed some calcium rich veggies to your snail like cucumber or zuchini.
The likelihood is if you have high pH water in the tank, then you have higher GH
, and if you have higher GH
you have sufficient calcium for a snail though. But thats not always the case.