I have had many Holanthuria (sp?) species sea cucumbers reproduce in my reef system. I have never heard of this before and I was wondering if this is common? I probably see 5-10 new "babies" in my tank every year or so. I haven't added anything in my tank for years, so I know they aren't...
I find that variability is high between calcium test kits. I would try a different test kit and test your tank water and compare again to your salt mix. I use a test kit that is easy and reasonably precise (but not necessarily as accurate as more expensive kits I've tried). I maintain my...