A tank between 10 and 30 gallons is the best size for beginners. Smaller tanks can be managed, but require more attention to detail. Larger tanks often take up more space than can be spared and are more expensive. Certainly, if you have a tank that is outside this range, don't hesitate to use it, but be aware that these instructions will have to be modified.
If possible, use a tank that is longer than it is tall. Tall, narrow tanks and those of unusual shapes are difficult to light adequately, and are also hard to work in. Some of the best tanks are:
Standard 10 gallon, standard 15 gallon, 20 gallon "long", 20 gallon "high", 29 gallon "high", 30 gallon "long".
All of these tanks can be outfitted with commonly available aquarium equipment.
Other equipment and supplies:
Enough good quality fluorescent lighting to reach at least 2 watts per gallon. An exception to this rule is the 10 gallon tank. This tank is small enough and shallow enough that you can usually get adequate growth of shade tolerant plants using a single 15 watt bulb as long as the bulb is less than 1 year old, and of good quality. Except for the 29 gallon "high" tank, all of the other tanks mentioned can be adequately lit with two bulbs of the largest size that will fit on the tank. i.e., two 24" 20 watt bulbs over the 20 gallon tanks, and two 36" 30 watt bulbs over the 30 gallon tank. For the 29 gallon size, you will need three 24" 20W bulbs for adequate light. Aquarium strip light fixtures come as either double or single bulb fixtures. You can use any combination of single or double bulb fixtures that will meet your needs.
Some good brands of bulbs are:
More expensive: VitaLite Pennplax Ultra-Trilux Triton
Less Expensive: GE Chroma 50 Phillips Ultralume 5000 Phillips Daylight
Glass canopy
Heater: 150W heaters are probably adequate for the 10-20 gallon tanks, 200W heaters will be adequate for the larger tanks. Buy a good quality submersible heater. Don't skimp here... a tank is left unattended too often to risk your plants and animals to a faulty thermostat!
Thermometer: Any aquarium thermometer will do, but I prefer the stick-on-the-glass liquid crystal type for several reasons. They are unobtrusive, but easy to read, they are inexpensive, and most are marked with both Fahrenheit and Celsius scales which makes them another useful learning tool.
Filter: Do not use an under gravel filter or other air driven filter in a planted tank. It will drive off needed CO2. Use either an internal or external power filter. There are many good ones on the market. My preference is for those that have rinsable, reusable filtration media rather than those with disposable "cartridges". They are less expensive to maintain, and more environmentally friendly. Any good pet shop can tell you which size filter to get for your particular tank, but it is better to slightly oversize the filter rather than skimping. A couple of reliable brands of outside power filters are Marineland and Hagen. Duetto internal power filters are excellent in a number of applications.
CO2 Generator: See specific directions for making a yeast reactor.
Electrical equipment: Use a heavy duty power strip to provide power for your aquarium equipment. If you cannot locate the tank near an outlet, use a heavy duty extension cord. You will also need a light timer (like the ones used when people go on vacations) to turn the tank lights on and off each day.
Support: Remember that an aquarium is heavy! Filled, it will weigh close to 10 pounds per gallon. 10 gallon tanks can be placed on a sturdy table. Larger tanks really need a properly designed aquarium stand.
Gravel: Use fine non-coated natural color aquarium gravel. It should be between 1-3 mm. in size, and not contain calcium carbonate bearing rock. You can test this by placing a drop or two of muriatic acid (available at the hardware store) on a sample of gravel. If it foams, don't use it.
You will need about a 25 pound bag for a 10 gallon to 20 "high" tank, you'll probably need a 50 pound bag for the larger tanks.
Laterite: This is an iron rich tropical clay that will serve as the nutrient base for your plants. Your local pet store will either carry it, or can order for you.
Another very good alternative for the substrate of a planted tank is Seachem Flourite. This product is attractive, easy to use and grows plants very well. You do not need to add laterite or other materials to a Flourite substrate; it can be used as is.
Tank Set Up:
These directions make the following assumptions about your tap water:
KH: (carbonate hardness) reading of between 3 and 8 KH. (test kit, or have the pet store do the test for you)
Phosphate: below .5 mg/l (test kit, or water department report)
Nitrate: Below 10 mg/l (test kit or water department report)
If your tap water does not fall within these parameters, you will need to make some modifications. Contact your pet shop for specific suggestions.
Place the tank on a stable, level surface. If there is even the slightest unevenness in the support, the tank can develop leaks. If you have any question about the surface that you are placing the tank on, place a couple of sheets of corrugated cardboard, or a sheet of styrofoam under the tank. Any excess can be trimmed off close around the tank. This is also a very good idea if you are using an open metal aquarium stand. The styrofoam will prevent heat loss from the bottom of the tank.
Before you go any further, fill the tank with water, wait twenty minutes to test for leaks and empty. This may seem like an annoying waste of time, because most tanks will not leak. But believe me, if you've bought the one that does, you will be much more annoyed if you find out about the leak after the tank is fully set up and running.
Install the thermometer, filter and heater, but don't plug anything in yet. Set your heater to approximately 76F unless you will be using fish that specifically need warmer (like Discus or Rams) or cooler (like Goldfish or White Clouds) water.
Rinse your gravel under running water until the water runs clean. The better you rinse your gravel, the less cloudy the tank will be when it is first filled. Mix laterite into damp gravel in a bucket. Use enough gravel to make an approximate 1 to 1 1/2" bed in the bottom of the tank. Be prepared, this step is messy! You might want to wear rubber gloves. While you want the gravel to be damp, try to avoid introducing any standing water to the aquarium.
Note: Seachem Flourite will NOT rinse completely clear - That's OK, it is an important property of the substrate, and if the tank is filled slowly, there will only be minimal temporary clouding of the water.
Next cap the substrate with enough plain rinsed gravel to bring the total depth of the substrate to 3". With a 10 gallon tank, you can get by with a gravel bed of 2 - 2 1/2". Level the front edge of the gravel carefully so that it looks neat once the tank is filled.
If you are planning to use driftwood or any decorative rocks, they can be placed in the tank now.
The next step is to fill the tank about 3/4 full of water. The water should be between 70-80ºF. The exact temperature is not critical, but you want to be within a range that will not harm the plants. How you fill the tank will make the difference between a tank that will be crystal clear by morning, and one that can take a week or longer to settle down.
Get a shallow saucer or bowl and place it on the gravel. VERY slowly, TRICKLE the water onto the saucer. Let it gently overflow, filling up the tank. When the saucer is completely submerged, you can speed up the flow a little, still aiming the flow at the plate. If this is done carefully, the water should be quite clear from the very beginning. If you aren't careful enough, don't panic. The tank will look cloudy for a few days, but it will eventually settle out.
When the tank is about 3/4 full, it's time to plant:
Here is a list of good sturdy beginners' plants. Those with a * are particularly good "nutrient sponges", and should be emphasized in a start-up tank: