So ive been worried about my snails getting bad shells, as I have malaysian trumpet snails and bladder snails with a single mystery snail. I worry about this because the last bunch of snails i had were ramshorns and their shells deteriorated pretty fast. I saw online that people used eggshells as supplements, I wonder if this would work. And if it does, whats the most effective way? whole eggshells? powdered eggshells? can they even absorb these, or do they have to dissolve into the water for the snails to use?