There are thousands of different coral species on planet Earth, but broadly speaking, they can be sorted into three different categories:
Read on to learn about the differences between these three coral types.
Archive
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.