Cyano Bacteria Attack!

That's not overly high for your phosphates but your algae is probably masking the problem at the moment. I would just keep up what your doing and see how it progresses. Sounds like using tap water and feeding a little heavy before may have been the start. Now that you have fixed those things I think it will die off.

 

I have cyano that appeared last week .... right in front of one of my Koralia 2s .....

 

Really? How do u like the koralia 2 otherwise?

 

Koralia 2's are cool I have 3 of them plus a koralia 3 in my 40b lots of flow

 

love it

 

I agree, I like mine so far...it's a little big and unsightly, but it seems to work well!