I feed my snails "snail jello" and they love it and it helps keep their shells strong and looking nice. My shrimp, cories, and fish love it too!
It is very simple to make. Here is the recipe if you are interested:
1 jar baby food (with 4% calcium)
1 packet knox unflavored gelatin
1 tsp. fish flakes (I add some spirulina flakes and crushed shrimp pellets too)
powdered calcium (I bought calcium pills from the pharmacy and just crushed a 1/2 one up in the mixture).
Heat baby food in microwave safe dish until hot, add unflavored gelatin and mix well. Then add crushed flakes and calcium. Pour into bowl and chill until set. Slice off a piece and drop in tank. It freezes well for about a month. If you can't find the calcium pills that is fine as long as you use baby food with 4% calcium.