Same shit i'm battling! Looks like moss only instead of hanging down it floats straight up off the rock... Since i started attacking the rocks with a toothbrush and spare powerhead i've noticed that it's coming back much slower..

you guys are still doing weekly water changes...?

i started dosing vodka along with MB7 from brightwell... along with the vinegar/kalk mix, i do water changes once every 2-3 months and about 15 gallons...

my tank is super stable and my sps love it... even my chalice grow like crazy and that's weird...

i recommend upgrading to ELOS test kits and dose accordingly...

elos test kits are crazy expensive - -but VERY nice kits

your dealing with bubble algae not diatom - -high nutrieants and lighting are the main cause . . water changes, watch the feeding, did either of you add anything fish, corals etc? fast large bio load increases with make a tank go into a tailspin too

cut your lights back to the bare minimum for a few weeks


Boss

I did go hog wild on coral a few months ago and it started up some time after that. I've moved a few powerheads around and added 2 that move more water through the rocks. I think i'm heading in the right direction just have to get the new bulbs...