Understanding the nitrogen cycle, also referred to as the biological cycle, is essential knowledge for not only cycling a new tank, but also for preventing dangerous ammonia and nitrite spikes in established tanks known as New Tank Syndrome. Here is an easily understood explanation of what the nitrogen or biological cycle is and how it works to keep your aquarium functioning properly.

More: Rapid Nitrate Reduction Water Change Method Reducing your nitrates from 100 ppm to 5 ppm can be accomplished in a few hours and uses far less water than doing repeated 20% water changes over time.

More: Top Nitrate Absorbing Products can reduce your nitrate levels to near zero without repetitive water changes. These products are easy to use and very cost effective.

You can build this outstanding Oak Aquarium Cabinet for a small fraction of what it would cost to buy. Complete plans for a DIY Oak Aquarium Cabinet, including material and tool lists, photos and material lay-out templates. This cabinet looks terrific and is not difficult to build. These plans can be used to make any type of cabinet - Oak, Maple, Birch.

More: DIY Glass Aquarium Plans Build your dream aquarium in less than an hour.

More: Aquarium Glass Thickness Calculator Easy-to-use Glass Thickness Calculator helps you determine which glass thickness will work best for your DIY Aquarium.

All corals have 4 basic requirements which must be met in order to survive in captivity. The specific requirements vary by coral type and species, but the 4 basics remain the same. Once you understand the basics, the rest is easy.

More: Soft Coral Profiles Save yourself a lot of money and heartache by finding out what a coral species requires before you buy it. Soft corals are among the most forgiving so they may be the right kind of coral to start out with. Facts, Information about Soft Corals.

More: SPS/LPS Coral Profiles Hard (SPS/LPS) corals can be a bit more demanding that their soft cousins, but with the right information, you can chose the Hard Corals that will work best in your tank. Here is the information you need to make keeping hard corals in your tank a success.

More: 15 Easy Corals Corals which are more forgiving of less than perfect tank conditions.

Forums: Xenia study Since I pass them each time that I head out onto the reefs, and did notice that wild xenia seem to die off just as our captive ones seem to do. Soooo.....

Photo by Phylis Daniels

The wide variety of biological filter materials (bio balls, bales, pin balls, barrels, sand, carbon, lava rock) available on the market today can confuse almost anyone trying to find the right one for their saltwater aquarium. Cost considerations aside, efficiency, adaptability and ease of maintenance are the factors considered when choosing the best material for your system.

More: Choosing a Saltwater Aquarium Filtration System In 5 Easy Steps This step-by-step method makes it a lot easier to plow your way through all of the possibilities.

More: What Is A "Biological Filter"? Do you really know? You should, since the biological filter is the heart of your aquarium.

Forums: Miracle MUD? Whats up with miracle mud? ...