I started my 14g biocube back in December of 2014 and added a CUC that included a few crabs and 2 branded trochus, 2 Astrea and later 3 nassarius for the sand bed. Lately I have noticed a few white specks here and there....but today I was able to find about 10-15 tiny snails around the rock scape and on the glass. ( I did not give them permission to have sex in my tank!!!) Is this a good thing? Will they all survive or will I need to weed them out of the tank eventually?