I bought about 9 Nerites and 3 Astraeas on my 60gal tank to help control Diatoms and to be part of my CuC. Seems that my diatoms has died off/eaten quite well to a point I am concern that my snails might not be getting enough food. I tried to put some Nori the other day at night but was not touched at all, so I retired in the morning. Is there anything I can provide them to supplement their food intake?

