Coralline algae fading?

[RLIrwin]

I'm very new to sal****er aquariums and I need some help. I have a 10 gallon
aquarium with two clownfish, a couple of hermit crabs and a four astrea snails.
I have a 15w flourescent light that I leave on 10-12 hours per day. I have a
filter
that hangs on the back of the tank (millenium 1000) and an under gravel filter
- so I think that water movement is pretty good. The water chemistry is as
follows: ph-8.2-8.4, ammonia 0, nitite-0, nitrate - 5 - SG-1.022, Alk -
normal, Ca - 450-500, dKh - 11. Temperature is kept at 78-80. I also have
begun
adding the kent trace elements product. I change approximately 2 gallons every
other week - beginning with RO water. About 4 weeks ago I got some fiji live
rock with reasonably good coverage of purple coralline algae, some sponges, and
a few pollyps of some sort (white translucent). Everything seems to be doing
ok except that the coralline algae is fading in places to a white color with
just little green. I'd rather keep in purple if possible. Any suggestions?

[Dinky]

"RLIrwin" > wrote in message
...
Everything seems to be doing
> ok except that the coralline algae is fading in places to a white color
with
> just little green. I'd rather keep in purple if possible. Any
suggestions?

IIRC, this is rather normal with newly added rock. I've been told that
rubbing it with a toothbrush will remove the white stuff, but never tried
this. In time, the coraline should come back. You may want to repost this in
a group that isn't pretty much dead like this one. Perhaps
rec.aquaria.marine.reefs

billy