Information on various diseases that could affect your fish.

Before we start discussing Coral health and related diseases we must distinguish between the three types of corals one gets:

Soft Corals
These are the corals that have no visible skeletal structure, e.g. Pincushion, Colt corals, Kenya tree etc.

Coral bleaching, what is it, and Why Does it Occur?
When corals lose their colour, it is known as "coral bleaching". Coral bleaching became an issue when it was first observed on coral reefs in the South Pacific in the 1990's. Coral bleaching also occurs in saltwater reef aquariums. So what exactly is coral bleaching?

Rapid Tissue Narcosis. (RTN for short)

This is one of the fastest spreading coral diseases in your tank. When you first spot it in your tank it normally is a little brown blotch of brown jelly like substance on the head of the Coral.