Algae Growth

[Jaws]

Rock is less than 2 years old and was cooked in bleach and muriatic acid then dried in the sun for 2 weeks so it was completely dead. It fully cycled for months before adding fish or coral too.

My PO4 is 0.05 but I'll have to test my nitrate tonight and get back to you. Thanks again for your help.

[Aquattro]

I notice that too in my tank. I have 2 large shelf rocks, one is covered, one is completely bare. I'm blaming my rock

[gobytron]

I am sure there is some scientific reason why that would happen, which you could blame, rather than your rock.

I have rocks that even after drying completely and cooking for a year or so, will STILL grow algae right away.

Some rocks seem to store phosphates (or whatever) considerably better than others.

At least in very anecdotal observation.

[brisco]

and some hair algae seems to have rocks attached. lol.

[gobytron]

Originally Posted by brisco

and some hair algae seems to have rocks attached. lol.

lol.

no joke.

[ClubReef]

For last resort, try API - Alagefix Marine. You can buy it on amazon.com and they will ship to canada.