There are thousands of different coral species on planet Earth, but broadly speaking, they can be sorted into three different categories:

• SPS corals
• LPS corals
• Soft corals

Read on to learn about the differences between these three coral types.

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Does your fish tank smell? If so, there are several possible reasons why. In general, marine fish tanks should be odour-free, except perhaps the smell of the ocean, so if you find that you can smell an unusual or unpleasant odour coming from your tank then you may have a problem that needs sorting out quickly.

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