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Maintaining Aquarium Gravel

Maintaining aquarium gravel is an important part of your overall tank care. In maintaining aquarium gravel, it is vital to mention that you should be careful with the depth of your gravel, or substrate, as it is commonly called. You do not want your gravel to be too deep, because this will prevent oxygen flow in your aquarium. Deep gravel also breeds harmful bacteria. When these bacteria have been in your tank for long enough, and have had a chance to grow, they emit a toxic gas called hydrogen sulfite. In small quantities, this gas goes virtually undetected. It is only after it has formed and developed over a long period of time that it begins to release into the tank. At this point, it becomes deadly to your fish.