Im still new at all of this I won't cut on anything yet. have to buy a book read...read...read... talk to FO people... maybe go watch them do it... then read some more.. talk to ya'll ... ask alot of ?... read more.. then maybe then I might... but you pay so much for all this stuff if I kill it. I would be sick.. I have only lost 1 snail & 1 shimp... been so lucky ...should have lost more than that... tank is 1yr. old in OCT. Im going so slow to try and do it right. so I can wait on the cutting... DO they bleed???