Planted Tank Obsessed
Join Date: Sep 2003
Location: port huron michigan
Hmm, I have nearly the exact same setup myself. How your moss is doing so well under the high lights amazes me, I have the same lighting and mine tends to turn brown from the high lights. My HC recently started yellowing too.
It has been growing great, big bushy growth covering a large section of the my tank, but lately I have seen some leaves yellowing. I thought of a couple things, I had recently overdosed on Excel trying to get rid of a small patch of staghorn algae. I also had stopped dosing KNO3 for the exact same reason.
So it could be either a nutrient issue or excel burn. Not sure.
Your situation may be different. Sounds like you might be experiencing a deficiency of some kind, possibly iron? Potassium?