My LPS 20gal. reef has been running under this fixture now for 1 year 1 month. All corals never lost any of there coloring nor bleached from the cross over. Matter a fact my Xenia's have...
Sadly ours died last week (pump malfunctioned and caught fire which had a domino effect of other water issues). He would hop along the front of our 200 gallon tank, loved to race back n forth....
Picked up my CB Target Mandarin from our FedEx station this morning. To say I'm disappointed about the condition of this fish is putting it mildly. I've yet to see a fish so skinny and still...
I kept shaving brush alive for a bit. Then, my lovely lemon peel started to eat it which triggered the hippo tang to eat it and then the clowns ate it.
One thing about Penicillus sp. is they're notorious for going shocky. They'll die back and appear dead, but more often than not, will eventually regrow.
I have heard that with proper calcium suppliments these "hard algaes" especially halimedia will "grow like weeds". dripping kalk, diy two part system and the like.