are apple snails and mystery snails the same? im looking into getting a few snails and a company nearby called elite inverts has mystery snails but the description says "sometimes refered to as apple snails". i have a decently planted tank now and want a few snails. mainly for cleaning but if i could get some personality out of them thats cool too. i was thinking 4 nerites and maybe 4 mysteries of some sort. being planted i dont want apples...correct?