Hey Plum....
I was at the LFS the other day talking with a shopper that swears by their saltwater... Barrier Reef gets their saltwater from the ocean as well, she has had her tank running for over 3 years with everything going great, doing 10% water changes in her 75 gallon weekly.
I make my own saltwater, using reef crystals and RODI, but the last time i did a water change, my tank didnt look so good for a few days and it freaked me out..... this is after i decided to do water changes from no water changes at all.. I have a whole 5 gallon bucket with reef crystals so i want to use that up first, and since i got an RODI unit, i want to take advantage of that even after i run out of my salt.
The thing that bothers me, is that one of the managers at my LFS says that the saltwater that all the local LFS get is usually from the miami bay, during an incoming tide... nobody will go out and get water from the nice blue, unpolluted, water since it would eat away at the profit due to gas costs. So that is making me wonder a bit about it...
But, on the other hand, all three sets of reefs down here are always in the greenish water (within a 1/4 mile) , and all are doing relatively fine. so the water may not be as polluted as i imagine... and by the time you get to the drop-off (depth goes from 100 to 300ft) there are no more reefs until you get to the bahamas...
And, all my LFS does to filter out the saltwater is run it though a large UV filter, and some particle filters....
Next time i am out in the ocean though (i hear the dolphin bite is coming on strong, but most are just schoolies with a few bulls every now and then), i will take a bucket full of seaweed and see what i get... take a few pictures and post them for all to see.... then add them to my tank and hopefully create a new trend in saltwater diversity... hey.. i may even bottle it and sell it under the "miniature invert package"
just dont give away my secretes...lol
On another note, i got the Nassarius package off the guy on ----... i ended up with 100 of those snails and that is just way too many for my tank... want some? I am actually thinking about going back down to Salties house and grabbing some more xenia that he wants to get rid of... i may give him some of these snails as well.