[Quinn]

i guess my feelings in the long run are that most of the salts are fairly close to the composition of NSW, they seem to work fairly well, and if one seems to kill sea urchin larvae and another makes corals grow slower, so be it. i wonder if there were confounding variables that may have caused the death of the urchin larvae. and you can't tell me that in the ocean, a. all the water is of the exact same specifics (becaues we know it's not), and b. urchin larvae aren't invincible there are plenty of other, bigger problems in the hobby that have a higher chance of killing off or at least slowing growth. in the case of corals, wouldn't lighting have more importance than salt mix? in the case of fish, feeding? people have used IO for years. it obviously works. why switch if it is a. more expensive and/or b. going to cause livestock to go through a stressful adjustment phase?