Black live rock

does it blow off easy or is it hard . i have seen black cyno now that some body mentioned it
 
I've seen this before ... My brother had a similar issue... I researched black algae and couldn't really come up with anything so I let him use some chemiclean that I had sitting around ... Chemiclean is for cyano or red slime... He treated his tank 2times in a row with it and it went away... The chemiclean had no negative effects on his tank ... I think it's like 12 dollars on eBay
 
Dude, that's crazy. The first thing I thought of also was "black cyno"...but there isn't much info about it online. Try siphoning it out as much as possible when doing your water changes.
 
there is no way i can siphoning it out,its hard as coralline man.
I bought lot corals from reefer(irky) few weeks ago on RC and he gave me some LR from his 2 years system.
You can see a huge difference:)
View attachment 5048
 
i tried lights out for 3 days and didnt help,all corals are happy.
30gallons changed every 2 weeks.
I will cook it for 3 months,will set it up even tomorrow,question is-can i do it all rocks and one time?
 
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