Symptoms: Small white pimples concentrated mainly on the fins. Pimples look like granules of salt. Treatment: Treatment of Ich can be difficult. There are several medications and preventatives available including Super Ich by Aquatronics and Maracyn and Maracyn-Two by Mardel Laboratories.
Information: This is the most widespread and common freshwater fish disease. The small pustules are actually sacks of tiny protazoans. In a few days, the sacks break open and the parasites fall into the aquarium gravel where they multiply in great numbers. When mature, the new protazoans attack the rest of the fish. It is this lifecycle that makes Ich so contagious. The protazoans will weaken the fish progressively by destroying the protective coating.
The protazoans may only be destroyed after they have left the sacks. When embedded in the aquarium gravel, they are susceptible to medication. Therefore, increasing the temperature of the water during treatment can speed up the life cycle, causing the pustules to break open quicker. After exposed, the protazoans are killed before they can multiply.
