10-24-2011, 10:32 AM
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Without knowing your tap water parameters it is difficult for us to be suggesting compatible fish. Cycling won't affect the parameters we are talking about here, being hardness and pH. You can ascertain this from your water supply people, many now have a website with water data posted. We want to know the hardness, both GH (general) and KH (bicarbonate, Alkalinity), and then the pH. Hardness will not change in the aquarium, unless you specifically do something to adjust it. And pH is related to hardness. It is much easier to select fish suitable to your water than trying to adjust water for sensitive fish.
Some fish are basic hard water fish: livebearers (guppy, molly, swordtail, platy), African rift lake cichlids [some of the fish pictured previously are among this group, though I would stay away from them due to other issues], and some other Cyprinids. Some fish must have soft, slightly acidic water. And some are adaptable within reasonable limits to medium hard slightly basic water. We have fish profiles, under the second tab from the left in the blue bar across the top of the page, and water requirements are given for each species. Once we/you know the tap water parameters, it will be easier to narrow down on fish.
A 29g tank seems large at first, but in fact there is limited space, so it is best to select small to medium sized fish that are compatible, meaning they share similar requirements for water, environment (plants, wood, rock, etc), water flow (your filter plays into this), plus of course their temperament. Not all fish will get along with all other fish, even though one may see them together in store tanks; that is a very different environment from putting them in a "permanent" environment and once settled they can be very different in their temperament.