I am lost in translation here...
When you guys refer to Zoas, are you talking about Hydrozoa?
http://en.wikipedia.org/wiki/Hydrozoa
If that's the case then the problem is that you are not dealing with an
organism but a colony of independent creatures. They can reproduce, given
the proper conditions, to become a pest not only to your livestock but to
humans too. Their nematocysts are very powerful.

I rather not have them in my aquariums.

iy
"Bryan" wrote in message
...
Stringer,

I have Zoa's and really like them. I wouldn't worry about them taking
over really. They don't grow so fast that you will have any surprises. I
have mine on a separate rock, away from the other bigger rocks. People
say these won't grow on sand but I'm noticing a small movement outward.
The nice thing is that on sand I can easily trim them back if/when that
time comes.

Zoas come in so many color varieties... they're awesome. I have a big
enough rock that I'm going to add a couple of more colorful varieties and
they'll all be on their own "island".

Not my pic but here's the single rock idea:
http://reef.eldersign.org/images/zoa_colony.jpg .


"StringerBell" wrote in message
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Hi,
I realize its mostly a matter of taste---but what are your feelings about
introducing Zoa colonies to your tanks?There are all sorts of great
deals on the internet for some beautiful species, but am a bit reluctant
to to "pull the trigger" on the purchase. When I try to visualize them in
my aquarium,it seems its possible they could stick out like a sore thumb.
Also---Ive read that they reproduce quickly and you could end up with a
lot more than you really want in there. Thats why Im also shying away
from the green stars.