What else could cause zoa stretch ?

[shadow_k]

Hey guys
I have these 2 zoas sunny Ds and Illuminati zoas they are still producing new heads as I only bought them with 1 head at the time. As you can see the other zoas in the back are opened and close to the rock.

My light schedule is pretty standard (yes I know it’s high but it’s what my tank likes) also my aquascape isn’t that high as well

thank you !

 

[blaxsun]

They usually stretch if they're not getting enough PAR. Or that particular one is weird. I had several large colonies that were stretching in my old tanks, and as it turns out I didn't have enough PAR despite thinking I did. Now the only time a colony stretches is if it's trying to out-compete another colony or if it gets knocked off by one of the over enthusiastic reef inhabitants.

 

[shadow_k]

Huh weird I’ll try moving them up to see if they improve! Thank you !