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  1. T

    How can you tell?

    How do you tell the difference between silica sand and aragonite sand. I know you can pt them in vinegar but what is supposed to happen?
  2. T

    Gravity Flow Rates For Different Sizes Of PVC

    I have custom built a 56g aquarium, but I don’t know what size holes I should drill into the bottom of the tank for my overflow box. I need to know the different gravity flow rates for the different sizes of PVC pipe, and what would be a good GPH for this system. I appreciate any help anyone can...
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