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Hyposalinity / OST (Osmotic Shock Therapy)

Hyposalinity or OST (Osmotic Shock Therapy) is one of the most effective, non-chemical ways to rid fish and an aquarium of saltwater ich and other parasitic diseases, as well as eliminate undesirable pests in saltwater systems, such as aiptasia anemones. Learn all about how to effectively and safely use this treatment method.
About Hyposalinity or Osmotic Shock Therapy
What is hyposalinity? How does it effect ich and other marine organisms? When is it most effective? When can this method of treatment be used? Learn the answers to these and other questions about using Hyposalinity or Osmotic Shock Therapy (OST), a simple, effective, non-chemical way to treat fish and saltwater aquariums to rid them of parasitic ich infestations.
What Hyposalinity Kills
Osmotic Shock Therapy (O.S.T. or hyposalinity) is one of the most effective, non-chemical treatments for various types of saltwater ich. Find out what marine life this method of treatment will effect, as it not only kills unwanted parasites and other pests that can plague an aquarium, but desirable reef animals as well.
How To Treat an Aquarium with Hyposalinity
Hyposalinity is a simple, effective, and natural way to help rid marine fish and fish-only aquariums of ich infestations. When the amount of salt in water is lowered, it results in a lowering of the "osmotic pressure" of the water as well, thus the related name Osmotic Shock Therapy (OST). Fish and a few other animals can adjust to this change in pressure, but ich organisms cannot. Here's how.
How To Give Fish a Freshwater Dip or Bath
One of the simplest and fastest ways to reduce and eliminate the numbers of all types of ich organisms, as well as flukes and lice that are parasitici on saltwater fishes is to give them a quick freshwater dip or bath. This method of hyposalinity is very effective, takes little time to prepare for, and is strongly recommended as the first step in treating ich diseased fish prior to placing them into a QT for long term treatment with the proper medication for what ails them. Here's How:
Hyposalinity Treatment Information
From the AMDA "Medicine Chest", although this article contributed by Lance Ichinotsubo profiles saltwater ich Amyloodinium Ocellatum, Oodinium, Velvet or Coral Fish Disease in great detail, it includes a good section about using hyposalinity.
Using Hyposalinity FAQ's
From the WetWebMedia Archives, discussions with Robert Fenner about using hyposalinity (the lowering of salinity) for treating parasitic diseases.

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