Calciun deficient?

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mela

AC Members
May 9, 2011
174
0
16
orange park fl
Real Name
Melvin Avery
Hi every one was looking at my glass cleaners (snails) and noticed that their shells look like they are delaminating. Could this be that they suffering from a lack of Calcium? Here are the results of my water test.
PH 6.2
Total alk 80 ppm
Total Hard 150+ppm(gh)
N03 20 ppm
If the calcium is low would Calcium Chloride work?

Here are some pics.

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