02-13-2012, 01:42 PM
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Just to restate a point already mentioned.
A larger tank is easier to keep stable once established. Aside from the larger volume required for water changes, a bigger tank is no more difficult then a small one. I would honeslty look into a 55g. Initial start up costs will be more, because of the better filter required and the obvious larger tank. If a 55g proves to be above your budget please do go with the 29g you mentioned... or maybe somethimg else inbetween 29g and 55g.
PS Dont feel it's necessary to buy new. I've bought all my tanks used with no problems. Even better is if they are set up still and you can get a jump on cycling the tank or have it done for you already.