i have few duzen new born snail that come out at night for a month now. they still small but finely starting looking like snails, not sand particles. it looks like smaller onse are long and bigger onse are round. it looks as they are growing very slowly, not like my freshwater snails. is that normal or something is missing? i add all the stuff that soft corals need. all parameters are normal. i don't add iron. :duh: