The coraline took off when I was using Oceanic salt. From what I read, it has alot of calcium. I've since switched to Instant Ocean; slowing the coraline down.
I still haven't figured out what these are; they have grown by more than 5X. They have also changed in appearance.
Any additional ideas of what these are? Two pictures; the first when the lights first came on and the second a couple hours later.