I've decided to buy a 10g tank and divide it for two bettas. I know there is no definite answer for this but what was the average time for all you 10g guys to cycle? also what would be the quickest and safest way to cycle? and could I manage to divide the tank for 3 Bettas and still have adequate room for them all?
My cycling was finished in about 2 weeks because when I did the small water changes I added water from my uncle's cycled tank. If you can get gravel, decoration, water, etc. from a cycled tank, it will really speed up the process. Live plants also speed things up. Otherwise it takes about a month, I think.
You can split it up 3 ways, that's a little more than 3 gallons each. Fines for bettas. :)