It's not a huge decision. The rocks I put in "Carib Sea Super Naturals" said they were good for saltwater too and they did pop up with a high PH. I guess I gotta get some of those "live rocks" to make everything work.
I have an undergravel running off an X-5 (great pump) - and a regular filter...and a heater that seams to be working at 78 degrees.
I'll put in the regular salt stuff.
I'll run it for two weeks or so and check Chorine/PH and then drop in a couple small Clownfish and see how they do.