Quote:
Originally Posted by iamfrontosa
Use the salt that will closely match the parameters you are trying to keep.
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This. ^
Having said that, what parameters do you want to keep? What types of corals?
Also, I'd highly recommend you plan to add some fish to the frag tank for a couple reasons: to provide nutrients (poop) for the corals, and to help clean the corals (keep algae off, maybe pests). Naso Tangs are my favorite fish to keep with corals because they eat pretty much any algae, and many of them will eat Bubble Algae too. However, most frag tanks are way too small for a Naso - maybe a small Tomini would be a decent choice, prob won't eat Bubble Algae though. Some Blennies are good, though I've seen Blennies nip/bite/damage corals too. Wrasses like a Melanurus or Yellow Coris are really good at pecking off critters like flatworms.