Sinking pellets are ideal. I feed New Life Spectrum Thera+A. Mine get the 3mm (along with the goldfish in that tank).
At least the rocks aren't small enough for them to swallow, but I would still get them on sand. Again, rocks (rocks or gravel) will trap lot sof debris that will lower water quality and make more work for you. Sand is a much better option.
Any pics of your tank?
At least the rocks aren't small enough for them to swallow, but I would still get them on sand. Again, rocks (rocks or gravel) will trap lot sof debris that will lower water quality and make more work for you. Sand is a much better option.
Any pics of your tank?