I haven't had the 10 gal tank up in 3-4 years after my fish died. Lost my oranda after bringing home a new fish. I was thinking of starting it up again. Still not sure what fish I want? Right now I have a little betta in a separate tank and want to know if I can start to cycle my big tank with the betta fish water when I change it. I would have to do it several times. Any suggestions? I could also go to the Pet Store and buy a cheap fish to cycle it, but even the cheap ones around here have gotten expensive. Is there any fish that will survive in a unrecycled tank starting out? or should it be recycled for all fish?