I have two;
A purple one with green eyes about half way up getting pretty good flow from an mp40 on reefcrest mode turned up I the max...about 14 inches straight line from it.
I have a green with golden eyes one about six inches off the sand bed directly in ye middle getting a fair amount of light since it is between the two metal halides.
My lights are 2x 250w 14k metal halides, and two 80 watt blue plus t5. When the pectina were on the sanded they did well to, but from what I understand stuff settling in them is detrimental to there health so I moved them off the sand. I know they will start to recede if your alk drops below 8, but recover pretty quick. I had my alk drop a couple months ago and they were my main indicator something was wrong
I just snapped some pics for you, only my blue + bulbs are on at the moment
For some reason my golden eyes don't snow the color in any photos but they are golden orange and there is about 15 eyes
Here's an old nighttime flash shot so you can kind of see the eye color
The mp40 is over to the right of this pectina, so you can see there is a slight bump and coral protecting it from getting direct flow but it gets decent flow.
Sent Via the R2R Forum APP