I've had two nerite snails in my planted tank for quite some time now, but unfortunately the soft, slightly acidic water has taken its toll on the poor things. My zebra nerite in particular has suffered shell erosion; I hadn't realized how bad it was until I got a good look a couple days ago. So tonight I pulled her out of the tank and applied some superglue to the eroded portions of her shell.
I'll be transferring her to my cichlid fry grow-out tank; the pH in that tank is 7.8, rather than the 6.4 of the planted aquarium. So although there isn't a difference in the GH between those two tanks, at least the water won't be eating away at what's left of the shell.
My other nerite hasn't been in as long, and doesn't seem to be in as bad a shape, so I'm going to see if I can't find a good calcium supplement for my tanks. The Amazon sword is definitely suffering what looks like calcium deficiency, so I don't think bumping the GH up a bit will hurt. (Famous last words. I can hear the algae laughing already!) I need some extra substrate for my main cichlid tank, which means a nice calcium carbonate sand and a few filter bags should take care of all the tanks at once.
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