Polyp Extension. Keys to having PE and causes for no PE?

[Justin/TiV]

<a href=showthread.php?s=&postid=6853592#post6853592 target=_blank>Originally posted</a> by bigdscobra
I have been fighting this same issue in my 29g reef. I have a close loop on a SCWD and a mag 7 and not great PE except this one milli that is under direct flow and its PE is amazing so I am thinking of uping the flow to a mag 9.

Also another thing is my MH light over that tank is 2 y/o and iam about to switch to a new one so hopefully this will help too.

:fish1:

I don't think you have enough flow. Is all you have for flow the mag 7 ?? you need to add some power heads

 

[MK Reefer]

I will second the wild caught milli's lack polyp extension.. I have many millis, (about 7) and the ones on the bottom of my tank under most flow have the greatest polyp extension.

My pink wild milli, shows the least amount of polyp extension, but still very hairy..

Mike

 

[shelburn61]

For millis more so than my other I acros, I think PE corresponds to how "happy" the coral is. I have noticed the most rapid growth and the best color on millis with great PE.