to provide some calcium, there is a product called calciumclay... usually for shrimps. Also works for snails..
What is the PH of your water? you can also clean some cuttle bones (boil it or something) and put a small piece in the tank.
My nerites never touched thise algae wafers.. you can try a blanched spinach or some other veggies. make sure to take them out after 24 hours.
I will look into that. Sorry I had to test really quick. My PH is 7.2. So the cuttle bone and veggies will be okay with my betta? I wish I could return these wafers, lol!
My Bettas: The Great Bambino *Babe* my big boy Marbled PK, Rosie my dainty Crown Tail gal ,my little HMPK guy Ginger Baker, Slash my Reptile HM male and my HMPK sweetie Sterling.