Elaine T wrote:
Tom Puskar wrote:

I have several goldfish tanks and each one has developed what I
presume is brown algae on the sides of the tanks and on some of the
artificial plants I have in them.

I change water about every two weeks because all the tanks are
overstocked. I scrub the algae off but it keeps coming back.

Should I treat with something or is this stuff harmless Looks like
heck though.

Thanks,

Tom in Howell, NJ

The brown stuff is harmless diatoms blooming on silicates in your
tapwater. Brown algae tends to go away once it's used up the silica,
and then is replaced by green algae. I don't know diatoms even affected
by algicides - I use Otocinclus catfish to eat the stuff in my tropical
tanks.

Gah...I don't know whether diatoms are even affected by algicides...

I should not post before I've finished my first cup of coffee. ;-)

--
Elaine T __
http://eethomp.com/fish.html '__
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