Originally Posted by shellieca
Its debatable on the cycling, some say it can happen others say not. I agree twice weekly at a minimum to be on the safe side. I've not run a filter in my 2.5g tanks so I don't know how fast toxins such as nitrites build up requiring more frequent water changes so just want the OP to be aware of the possibility.
Right, right, nope I agree :) Always best to be in the know!
I've never cycled anything under 5 gallons because I do do two weekly changes on them and they do have filters, I've never had a problem with ammonia getting to high, but I also suck out any poo with a turkey baster when I see it during the week, so that helps as well.