Odd alge groth

[Zerandise]

I have got some odd rust brown/dard brown gunk growing on a small portion of my sand. Half of the substrate is 3 years old the other half is new. As well I just added in 60 lbs of rock i have cured in with the 40 i already have.

The groth is making what looks to be a slime *shell* over parts of the substrate.

I will post a pic of it as soon as i can. Has me a bit worries. My water tests perfect in every way as well (even in iron) so im not sure what it is. It had run fine for ever tho.

[Zerandise]

here is a pic tho it doesnt show off the orange/red of it.

http://www.morgalis.com/hunkybabe/funk.jpg

[Quinn]

Cyano. I would search for it here on the board, it's come up a few times in the past.

You also have an aiptasia there, not sure if you are aware.

[Zerandise]

heh yeah i am. It is on an old piece of rock that is coming out of the tank as soon as i can con my LTA to move off it :)