Zoo's Partially Open ?

[madimod]

the zoos in my tank open up
but the skirts seem to not extend .
my mushrooms also seem to be affected .
my sps are fine and all my aquarium levels are fine
but my calcium seemed a little low . could that be the problem ?

 

[mangus7175]

Have you changed your lights/bulbs recently? Or moved the zoos to an area that gets more light?

 

[madimod]

different t5 bulb combination .
and I plan on changing again soon

 

[Stanton]

In my aquarium that would sound like low alk too me. I've seen it cause some zoa colonies completely close and some mushrooms shrivel up while not affecting other colonies at all.

 

[mangus7175]

If not caused by low alk as stated by Stanton it may also be that the colonies just need to get used to the light. I remember when I changed my lights from purely T5's then switched to a 150W MH w/ T5's all my mushrooms and colonies just decided to close up and when they opened again all their skirts shrunk. After acclimating to the new lights after a few weeks everything went back to normal. But definitely check your water parameters as that can also contribute to the problem.

 

[madimod]

I may have to check my alk again I checked it when I noticed my this problem andand it checked out ok but it could have been a little low I'll recheck tonight . thanks