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  1. If our Salt Water Reef aquarium calcium levels test at 500 mg/l, is that too high, and what do we do if it is?

    If our Salt Water Reef aquarium calcium levels test at 500 mg/l, is that too high, and what do we do if it is?

    A calcium level of 500 mg/l is higher than most people run their tanks at but as long as your alkalinity level is also running high it may not be an issue.  When high levels (or low levels) of...
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  2. Marine and Reef Aquarium Substrate By Daniel S., MarineDepot.com Reef Squad

    Marine and Reef Aquarium Substrate By Daniel S., MarineDepot.com Reef Squad

    If your first fish tank was anything like mine, all you needed to worry about for substrate was which color rock you'd like covering your undergravel filter. For the record, I chose blue...
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  3. Seawater In The Aquarium by John Cunningham, Aquarists Online

    Seawater In The Aquarium by John Cunningham, Aquarists Online

    We all know seawater. It covers the majority of the earth’s surface and can be measured in cubic miles. There’s definitely a lot of it and it doesn’t just contain salt, it is a...
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  4. The Doctor Is In: Q&A with Ronald L. Shimek, Ph. D

    The Doctor Is In: Q&A with Ronald L. Shimek, Ph. D

    Ronald L. Shimek, Ph. D.: I am invertebrate zoologist/marine ecologist who has kept marine animals in aquaria since the invention of water. My scientific work has been mostly with animals that live...
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