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Pet Product News Editorial Blog:

Friday, August 13, 2010

Fish for a Freshwater Nano Tank

By David Lass


There seems to be a definite trend in aquariums today, with most of the action being on the two extremes, the very large and the very small. The small tanks, usually referred to as “nano-tanks,” are extremely popular and there are many available from 1 to 6 gallons. Most of these come with filtration and lighting, but without a heater; not having a heater is not really a problem, since most of the fish that should be kept in these small tanks can do just fine at room temperature. After all, you are not going to keep discus in a 6 gallon tank.

To my way of thinking, there are two important aspects of selling nano tanks: 1) you must have a knock-out one (or more) set up in your store; and 2) you must provide the right fish for this type of setup. Having a display nano tank (or more) in the store is really simple, as they do not take up much space, are easy to maintain and nothing sells like seeing the tanks with fish in them. When it comes to stocking a nano tank with the proper fish, things get a little dicier. Often juveniles of some species are sold, with the idea that the hobbyist can remove them when they get larger (they won’t do this) or that “fish only grow to the size of the container” (which is false).

Fortunately, there are bunches of coming into the hobby today that are ideal for nano tanks. These are basically new rasboras and danios that have been found in the wild and are being bred commercially. Of these, the best--absolutely the best--fish ever for nano tanks is the celestial pearl danio (formerly known as the galaxy rasbora until ichthyologists figured out it was, in fact, a danio). CPDs, as they are known, are very hardy, don’t care about temperature or feeding, and are at most 1 inch at maturity. Keep them on a dark-colored gravel with a few plants and they become gorgeous. They are now being raised commercially, so the price has come down. The CPDs should definitely be that stars of the section of your fish room that features fish for nano tanks.

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