The white is dead coraline algae

Wayne Sallee
Wayne's Pets


KurtG wrote on 6/23/2007 4:25 PM:
I've have the same thing going. It looks like somebody dipped my rocks
in frosting complete with a few drips down the side.

If it's dead, then is probably also inorganic from carbonate deposits.
This will some times happen during warming, but then I should see the
same thing on my heater.

I'm thinking it's some sort of coraline algae. It only seems to be on
certain rocks or rocks within the same location. If so, I have purple,
pink, deep red, and now white algaes growing.

I need to find somebody with a microscope, so I can take a sample and
have a look at it. Nobody seems to have one just laying around. :-)

--Kurt