I purchased a bunch from my LFS and they seemed fine and healthy. I skipped a day of dosing trace and iron and macros and noticed the completely lost their color. I was back on track the very next day. I dose the macros everyother day and csm=b plus extra iron and some seachem iron on the opposite days,all GW ferts. I have 4-65watt pc's and my co2 ppm at 45. What happened to them? What the trick with these guys?