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Is this a new 10-gal you are setting up from scratch, or are you having trouble with the cycle using a betta and white clouds?
I won't bombard you with links on the nitrogen cycle just yet, so clarification will help, but there is tons on the web pertaining to cycling a tank, and you can also check here in our Articles section. Good luck!
I'd encourage you to go fishless if possible, because it can be very hard on the fish to endure it. If there is some gravel or filter media you can "rob" from your small tank that will help seed the new tank.