I've seen a lot of topics on broken snails shells. I was wondering about how to maintain healthy shells over the long run. I currently have two purple apple snails and have 4 on their way. One of my apple snails has lots of scratches on her shell and I was wondering if I can put something on it to help? I fed them tangerines and then let their shell soak in honey for antibacterial purposes (I made sure not to let it come in contact with their skin). Would it work if I made a paste out of calcium rich fruits and let it sit on their shell for 10 minutes every so often?
Feed protein and calcium, and make sure the environment is not acidic, and the young snails will develop normal shells, and any new growth on older snails will be healthy. There is nothing you can apply to reconstruct old shell material. Since they are aquatic, make sure you are maintaining the calcium correctly.