I've experienced that a couple of my chalices lose some of their pop and even start to bleach while others are doing great (growing and showing popping color). I don't run GFO or carbon, but skim. Alk around 8.3. PO4 is usually pretty low (0.0-0.4). I've moved the faders into the shade, but they don't seem to want to come back. I keep all my chalices on the bottom and run AI Hydra 26's with full intensity only at blue/royal blue 50%, whites 17%, others at like 7% or less (and that's only for 4 hrs/day), the other 8 hrs/day are lower (35% on the blues, 5% on white). Anyone have any ideas? I'm planning on continuing to move and monitor but thought I'd see if I'm missing something obvious.