I have had water as well but that doesn't automatically mean its calcium rich.
When I was doing aquaponics I'd learned that when you fix a magnesium deficiency (with epsom salt) it can cause a calcium deficiency, so I had to be careful not to use too much. Not sure if you dose magnesium in your tanks for any plants?
Some people add (cleaned) egg shells so if you can work eggs into your diet (or just not toss the shells) have omelets, keish, sunny side up etc etc and don't.toss.the.shells. Youtube videos talk about preping egg shells for aquariums.
I've not used it but people recommend snello or search recipes for snail jello.
Thanks for the info.
The last two weeks, I've been using aquarium salt according to recommended dosage. Not for any particular reason, like a preventive tonic. I happened to have among my supplies for years and did not want to throw it away, so I started dosing it (Aquarium Pharmeticals).
Never realized it would cause a calcium defficiency.
I hear you on the eggshells. My 12yo daughter like to eat 5-6 poached eggs over toasted sourdough at a time. We run through a lot of eggs. I'll rinse the shells and set them aside until I can check out youtube videos on how to make the shells bio-available in the water column.
That's what it is. Unfortunately co2 will eventually eat away some of the shells of snails, it happens with all of my snails in my high tech tanks. It's why I don't add nerites to them anymore, while it seems to take a while and the snails otherwise still appear to grow and be healthy, it doesn't look very attractive at the least. I do keep bladder, ramshorn, and MTS in the high tech tanks, though.
But yeah, it's the co2.
Well that sucks.
I want my co2 and healthy snails as well.
Thanks for the heads up - I'll see if I can research some sort of workaround for snails in a co2 dosed tank.
Meantime, I'll back off on the co2, the main plants are growing too fast anyhow and its a real chore to keep them trimmed.