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NFC: A native Fih Community tank



                                          The North American Native Fish Community Tank

Robert Rice
roberterice at juno_com

A great many folks out there have a wonderful idea. If I could stock my tank with local species I could save a few bucks and learn about the local flora and fauna at the same time. Then I could spread the word all over town about how these fish are pretty and cool ! Alas most folks don't know where to start, so they do not start at all! This article ( I hope) will motivate you the readers of TFH to think a bit about doing the N.A. native thing. It is fun, easy, and a good way to help your community. You see folks who collect are usually the first to discover pollution and other local environmental problems (the "it stinks the most when it is in your house" theory). Then you factor in the general absence of most local species' life history, and the lack of public awareness of even our most common non- game species and you can see how aquarists can help with the dirty work. However, to help, you must consider your hobby a bit more than a form of live TV. You must consider your hobby a form of nature study. Many of us do, we just need your help to get the word out and the job done. We should let the local authorities know aquarists count. Please join a conservation organization, it will make a tremendous difference.

To start off you must begin to observe the things in nature if you are to successfully create a N.A. Native community tank (what fishes school together, live together, eat together and die together). With just a bit of observation you will see that in all parts of the country there are species that make a great community tank. I live in North Florida and have created several biotype tanks for local schools and nature centers. It is just as easy to do for the home aquarium. First we must understand the environment in which our future tank inhabitants live. If the water is tannic and soft, or clear and hard we must adapt our plans and tank setup accordingly. It is much easier for us to change our tank setup than it is to change the basic nature of our fish.

A water sample and a temperature check will yield the basic information that you need. If you are replicating a local pond it is relatively simple. A substrate of 6 inches of medium gravel and a simple box power filter and a hood light should be all you will need. Heaters and powerheads are unnecessary. Just set it up like a typical generic setup with some cover and a few live plants and you are in business. Fishes that would typically do well in such a setup would be killies of all types, the smaller sunfishes you know such as orangespot sunnies, longears pumpkinseed, most of the catfish family including the madtoms and a few of the tougher shiners like the golden shiner, red shiner (AKA the Asiatic fire barb) and fathead minnow (AKA tuffies, goldies or some other cute trade name). With this type of diversity available you should have a tank that is busy on all levels. Now when it comes to dinnertime most natives can be induced to eat prepared food. However I recommend a mixed diet of frozen, prepared and fresh when available. Your pond tank will need a nice mix.

The second most popular setup is the stream or riffle tank. This easy to make setup is perfect for darters, sculpins and many of the shiners. Darters and shiners are some of the most stunningly beautiful fish you will ever come across. They are truly the hidden jewels of our North American fauna. When I build a riffle tank I seldom use gravel. Instead a use egg sized stones I collect from various sites and pile them in cave like formations at one end of the tank. I then let the outflow of the box filter pour down onto those rocks creating eddies and riffles that these fish love so much. I also will set a stand -alone small pump on the opposite end of the tank aimed at the middle of those rocks. I prefer Aquarium Systems micro Jet but there are others out there. I mix in several small clay pots and I am in business. When setting up a riffle tank make sure that your location does not get above 75 degrees for extended periods of time as it will stress and can kill your specimens. A basement is just about perfect. For lunch you are going to have to feed frozen bloodworms and live worms, or shrimp if you can get them. Be forewarned, sculpins are serious chow hounds, so you might want to feed them redworms in addition to the other feedings or they may eat their neighbors. One of the simplest and least expensive setups is what I call the ditch tank. I do not mean this in a demeaning way, I just find that it is the perfect setup for those small fish and insects my daughter and me find in local ditches. I simply take a small tank with no gravel and add as much floating vegetation as I can get. I prefer Java Moss, Water Sprite or Nitella flexis ( AKA needle grass), a hood, and an air stone and that is it. I do a 10-20% water change once a week or so removing the debris off the bottom. This set up is perfect for species like the Pygmy Sunfishes, Heterandria formosa and small killies like Leptolucania ommatta. I keep several "ditch tanks" in my garage with temperatures in the upper 80's and have no ill effects. The key to this set up is to only feed live or frozen foods about 1X a week and do regular small water changes. I have had so many colonies of ditch fish set up over the years I can't recall them all. However every one has had a healthy, self-sustaining population with little or no work. I highly recommend a ditch tank for your home or school. Watching those Everglades pygmy sunfish males in full color displaying for a female still gives me thrill. Their velvety blackness with iridescent blue spots it as good as it gets. I have even raised Blackbanded and Bluespot sunfish in my "ditch tanks" so I highly recommend a "ditch tank".

The last and very popular setup is the super predator single fish single species tank. Typically these setups are used for Bass, Bluegill, Gars, Pickerel, Catfishes, Bowfin and the like. The sportfishermen will often times love their quarry so much that they set up a home aquarium as a further way to study and enjoy their adversary. For this setup the only real concern is keeping the fish in the tank (imagine if a Gar struck at an errently placed child's finger), enough filtration to cover for their messy eating habits, and durable decorating materials. An Aquaclear 300 or similar type of filter and a 40 Gallon tank with a deep gravel bed are my minimum recommendations. These monsters will sit for hours still and quite then suddenly leap into action when a prey species is detected. This makes for a very exciting tank. Most of the time visits to the local bait shop are necessary to keep these beasts happy and full. A great tank indeed.

A N.A. native species tank sound good, doesn't it? Now before you run out there with a net or fishing pole, do a little homework. Check on the various legalities and limitations with you local fisheries department. You might also want to check into the excellent book, Peterson's Field Guide to Freshwater Fishes by Larry Page and Brooks M Burr. You will also want to check into the Native Fish Conservancy, an aquarist friendly non-profit conservation organization or NANFA, a native fish aquarium society at WWW.NANFA.ORG. I can be reached at robertrice at juno_com

. Until next time good luck and good fishing.