Wife is looking for a cool blue coral.

What about a blue milli?

http://4.bp.blogspot.com/_MJK1lOK45...YvHTzKvJYlI/s400/Aquaculture millepora 19.JPG

 

I have a gorgeous blue tort... also have seen some acros generically listed as 'blue tip acro' which develop blue tips on the growth ends... looks really great actually!
ora pearlberry has a slight blue hue to it

 

i have a blue tork though. looks more purple to me. one of my fav corals by far!

 

You and your mom's tank is really looking good. The green monti is sweet. Like the blue zoa also but have alot of zoa already so want something different.

 

There are several varieties of torts that are blue. I have 3 kinds now.

Other blue corals are say an ORA dustins deepwater SPS, and some favia have blueish highlights. There are other blue SPS though.

Clams would be the easiest way to get blue/ purple, but if you want to hold off on clams I understand.

The blue zoos are out there too.

 

went with a oregon blue tort frag.. see my thread last page
http://www.3reef.com/forums/show-of...arting-over-t-ball-redsea-max-130d-55923.html