i have two mystery snails in my 29g tank which only houses three 2 month old male guppies. i have noticed that one (the snails) has gotten very big and seems very active, the other one though hasnt grown much, is active but nothing compared to the other one.... and yesterday i noticed that it had two ball like lumps on its left antenea. is there something there that i should be concerned with involving these lumps and lack of growing?
