Hmmmmmm, Read this information..
"(3c) Archerfishes (Toxotes spp.)
There are two commonly seen archerfishes, but they differ hardly at all in maintenance. Toxotes jaculatrix is known as the common archer. This is a deep bodied fish, bright silver in colour with bold black bands along the side and dark edges to the anal and dorsal fins. Toxotes chartreus is similar but has smaller spots between the black bands along the body. Both species grow to about 25 to 30 cms (up to 11 inches), so a large tank (over 100 cms, 3 feet) is needed.
In the wild these are schooling fishes. Opinion is divided as to the behaviour of these fishes in captivity, but as a rule it is best to keep either a single specimen or a school of similar sized individuals. They can be aggressive to one another but are totally benign toward their tankmates.
Archers specialise in catching aerial insects. They sometimes leap (like salmon), but are best known for spitting at insects, with a range of up to 150 cms. In captivity they can be 'trained' to do this quite easily. Begin by setting the tank up so that about 10 to 15 cms (4 to 6 inches) of glass is above the waterline. Once the fishes have settled in, feed them on small crushed prawn chunks. They will happily take these midwater. Then stick them to the glass at the waterline. The archers will pick them off. Gradually place the food a little higher each time. Eventually the fish will jump against the glass to get the food. Once the food reaches a certain height they give up jumping and start spitting. Enjoy!
Archers will adapt to almost all water conditions from medium hard freshwater to full strength seawater. They do well in planted tanks, especially 'paludarium' style set-ups. A specific gravity of 1.005 is fine for long term health. All archers appreciate warmth, from 25 to 30 degrees-C (77 to 86 F). They dislike 'new' water and do best in a mature tank."
taken from here -
http://www.aquariacentral.com/faqs/brackish/FAQ3.shtml
Specifically the last paragraph.... 'Archers will adapt to full strength seawater' ?? This is the first time I've read that.. although this information seems credible otherwise.. but what do you think? In all honesty I have no desire to put him in full strength saltwater, just at the maximum salinity he can handle because I feel it will be more beneficial for the other fish he shares the tank with (monos, scat)