Will Hypo Salinity Stress/kill A Fish?

WaterssretaW

New member
What exactly are the effects of Hypo Salinity on a fish?

Should I implement the hypo theory on every new fish coming into the DT?
 
hyposalinity is a pretty safe treatment if done correctly. in my opinion its not a very affective treatment for paracite investations but can be a good preventative. it usually knocks all paracites but doesn't kill them. often times they adapt to it and come back or they become active when the conditions return to normal. its such a popular treatment because its safe for the display in many cases.

i think its very important to quaranteen all new fish in a seperate tank with medication for all internal and exteral paracites . some people put the fish on observation for several weeks in a qt tank and only medicate if the fish shows signs. the observation method can take 125 days to be absolutly sure theres no paracites. so i prefer to treat them right away.
 
Hypo can be very effective for some parasites, but not all. Same can be said for any treatment out there. There is no one treatment does all. Hypo is effective on the most common strains of ich and the most common flukes that one comes across in the hobby. To be effective, the s.g. must be maintained between 1.009 to 1.010 for 4 weeks, and measured daily with a lab grade hydrometer, refractometer or conductivity meter. In general for new fish, I recommend quarantining for at least 6 weeks and treating as necessary for anything you observe using a specific treatment known to be effective for what ever happens to show up during QT.
 
As a side note, hyposalinity (done correctly) will actually reduce stress in marine fish. This has to do with lowering the osmotic pressures that the fish has to struggle against, thus making it much much easier for them to osmoregulate (the opposite is true for FW, thus we add salt to their water).

My quarantine tank get SG slowly gets lowered to 1.010 when after new fish are added. Then I watch for parasites or lesions, and treat accordingly.
 
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