Many Leathers and softies do put off chemicals to inhibit calcification, could be other chemall warfare going on as well. I only has lps and apa in my frag tank with softies, but they have alot of room and more water dilution. Also, im glad I saw your post. I just checked my "maintenance free" ozone setup, and it wasn't even injecting the ozone into the reactor. Save $500 building a reactor, gain a headache. 
