I believe that a Discus aquarium should be entirely geared toward keeping Discus fish, as other species generally do not require the dedication and environment that Discus need. The setup, plants and other inhabitants should be carefully chosen for optimal conditions, giving the Discus fish first priority. Discus are calm, timid fish who like to be kept in small groups of five to eight fish, as like other schooling fish they need the security of a school around them. This also helps in reducing stress of acclimating to their new environment. Outside of other Discus, what tank mates you choose again entirely depends on the purpose.
If you want a nice display tank, Discus fish feel comfortable with small schooling fish such as characins. When Discus fish see the characins in the open, they are likely to come out sensing that they are safe to swim.
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Keeping fishes is fun and enjoyable hobby. But there are some basic things that you will need to know before beginning your new hobby. It is always healthier to get an aquarium ready before buying fishes as the fishes need to have a ready setting to live as soon as we bring them home. Reading everything about setting up an aquarium fish tank helps a lot in making the right purchase.

Aquarium fish tanks come in diverse shapes, sizes and styles. The size of the aquarium fish tank you decide should fit in your room. A fish tank for beginners is generally 10 or 20 gallon. The tank should not be positioned in direct sunlight since this can badly affect the temperature of the tank. All aquariums should have a cover to avoid evaporation of water and to keep the leaping fish in the tank. Aquarium fish tanks may be made of glass or acrylic. One should look it over carefully for scratches or cracks before purchasing.

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Fish tank filters are available in all types and in any shape you need. The purpose aquarium filtration is to provide high water quality for your fish and keep the water clear and free of any debris. Aquariums are closed systems, and that fragile eco-system relies on you to thrive and grow. To achieve this you will need to select the right type of filter and the correct size for your tank.
3 Types of Fish Tank Filtration:
• Mechanical: The most commonly used. It removes waste, excess food. These filtration systems usually pump the water through some kind sponge, pad or membrane. These filters should be replaced regular based on manufacturer's recommendations. Some of the more common types are:
o Floss
o Sponges
o Pads
o Sheets
• Chemical: Activated charcoal is the most common chemical filter. It is that same that is used in drinking water filtration.

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