The disease works in the same way for both freshwater and saltwater fish but have different life cycle durations and different cures. In both types of water, the protozoan parasite attaches itself to fish in order to carry out its life cycle. In the wild, ich is less of a problem as few parasites are ever able to find a host. When they do, the parasites eventually fall off of the fish and the fish is able to swim away and heals its wounds. However, in an enclosed tank, ich parasites can easily attach itself to fish, multiplying and infesting, which eventually leads to the decimation of an entire tankful of fish.  In freshwater, ich is known as ichthyophthiriasis.   In saltwater, ich is known as cryptocaryon irritans and is often confused with other parasites that produce white spots. Saltwater ich can take longer than freshwater ich to replicate but only have 12 to 18 hours to find a host before they die as opposed to freshwater ich which can last up to 48 hours without a host. Since ich is fairly common, most fish have developed a good immunity against it. However, stress can suppress the immune system of a fish and that's when ich is most prevalent. Stress can be caused by:  Incorrect water temperatures and bad water quality. Other tank inhabitants. New tank inhabitants. An improper diet. Shipping and handling of fish during transport Your own home environment, especially if your home is prone to loud noises, banging or shaking doors, or have a lot of traffic around the tank. Symptoms of ich can be seen on your fish as well as in the way your fish behaves. The most obvious sign of ich is the appearance of little white dots that resemble grains of salt which gave the disease its name. The common signs and symptoms of ich are:   White spots on the body and gills of fish. The spots may even join together to form white patches. Sometimes, the ich is only found on the fish's gills. Excessive flashing. Your fish may excessively rub against plants or rocks in the tank in attempt to get rid of the parasites or...

How would you rephrase that briefly using Indonesian?
Pahami perbedaan penyakit bintik putih pada ikan air tawar dan ikan air asin. Pahami bahwa stres adalah faktor yang cukup mendorong penyakit Ich. Pelajari cara mengenali gejala Ich. Obati penyakit Ich pada saat parasit paling rentan. Pantau suhu akuarium.