I never cycle my ten gallon tank and most of my fish do fine. I mean I have 5 platies or mollies 2 peppered corydoras and 1 otto. I have to admit 4 of the ottos I put in there died and one rubberlip died 2 hours after I bought it. the rubberlip I think died because the pet store wasn't very good and 2 of the ottos I Bought at that same store died very shortly after I put them in there. 2 of the ottos I Bought at petco died. and 1 mollie died for some reason . but all in all most of the fish I have put in there have lived and are very healthy and active.