I have a Marina Goldfish Starter Kit; its a 1.77 gallon tank. It came with a filter but someone had told me that betta's dont require a filter and prefer not to have one in its tank at all. I had aslo baught a jug of distilled water that I am currently using for the tank and was wondering if that WOULD be the best type of water to be using? When I had gone to Petco I saw they sold "special" water just for betta fish as well as normal freshwater sold for tanks, and I wasnt sure if that would be better than the distilled water I'm using now. Another question I have is, do I still have to cycle the tank? If I shouldnt be using a filter, how would I do this or should I do this at all?