Acclimating Fresh to Salt

[TJ3000]

I was at a fish shop and I coulda Sworn that there was a green spotted puffer in the Salt Water Tank... WHAT'S UP WITH THAT!? How do you Acclimate a Fresh Water Fish to Salt Water!?

Crazy I tell you, CRAZY!!!

[Tapiana]

Depends upon how big the GSP is - they do move up to SW as they get bigger. You just raise the SG a little bit each week until the are at the correct SG for their size.

[Nick]

I've seen even very young GSP acclimated to salt water. Probably not the best idea, but certainly not fatal.

[Agnate]

How do you Acclimate a Fresh Water Fish to Salt Water!?

The mistake is in the logic; they are not a freshwater fish, but are actually a brackish fish. As they mature, they prefer to be in high-end brackish (an SG of around 1.016 - 1.018). At this level of salinity, it's much easier to acclimate them to a marine tank and use Live Rock and a Skimmer as the biological filtration (saves on water changes and salt).

Hope that helped to clear things up.