Coraline Alage turning white?

[marcog]

Hi guys,
I just did a waterchange, my levels are all good. But I noticed today that the coraline alage that is growing on the black back overflow tube has turned white. It is starting at the top of the tank and continuing to go down. Has this happened to anyone else? Everything else is the tank seems to be doing fine.
Thanks and Happy Holidays,
MarcoG

 

[toughguy80]

I think that's a sign of it dying. Mine seems to go through cycles of some die off then it regrows. It's nothing harmful.

 

[harndog]

mine did this when I switch to MH all but the really thick stuff on the glass turned white and fell off the thick stuff and on the rocks is still going good and i am starting to get regrowth again