Ok, I went back to the website I was at and it said it can happen from too much light or not enough light. I guess they are saying you have to find the sweet spot. If they are down lower, move them up a little and see what happens. Try spot feeding as well. I am not an expert as you can tell but just telling you what I had read about it to see if it helps you at all. Look up the requirements of radioactive Dragon Eyes and see what it says about required lighting.