Tom,
I was running a search on hyposalinity for a project I'm working on and saw this post. It looks like its been up for a couple of weeks with no answer - or am I just missing something?
In any event, the other hypo thread going has advice about not using copper and hypo concurrently.
Regarding returning from hypo to normal salinity - people sometimes get this wrong. Believe it or not, you can go down in salinity virtually instantly, but the return must be done extremely slowly. I've seen people write that they lower their salinity over "a week's time". This is too long if the fish have an active Cryptocaryon infection. You can drop the salinity within 24 hours in every case (although I do not recommend that people go quite as low as a specific gravity of 1.009)
Raising the salinity must be done over a period of days or even weeks. The fish's osmoregulatory system needs time to adapt to the more saline water. Signs of going too fast are fish that suddenly look really thin - they literally are dehydrating. I typically raise the salinity by performing partial water changes with normal salinity make-up water.
Jay Hemdal
I have used qt with copper treatment as neede for a couple of years. I am changing my qt protocol to hyposalinity . My questions are:
