Sry in advance because i cycled my tank with fish. i have 5 guppies... 2 male 3 female which i know is not a large enough F:M ratio but 1 female died during the cycle... my amonia is at 0 ppm my nitrites are through the roof but i do have nitrate readings. The larger male guppy is looking kinda bad, he has yellowish coloration which is not natural for him and his tail is getting frayed... is this yellow velvet? if so what should i do i already put 1 Tblspn of sea salt in 10 gallon tank and my water temp is 80*f. Should i do anything about him like varying his diet? I have heard buying medicine is not a very good idea thx in advance for your posssible replies. ** Edit : sorry the larger male died today. If there is anything you recommend for keeping my fish healthier please tell me im new to owning fish. The people at Petco are not very helpful.