Zoas shrinking

[Hungriee]

I have a colony of Mohawks which use to look awesome, then this summer I've noticed astrea snails chilling out on the disk and grazing over the zoas. The zoas are shrinking in polyp size and the color of the polyps are no longer stunning, rather brown. Whats going on? Anyone know?

 

[scarf_ace1981]

what lighting do you have??? what are your parameters??

 

[SoGOOD]

maybe its time to change the bulbs??

 

[onegreenray]

do you have a picture of what the zoas look like. i might be able to tell you if there is a predator or worse zoa pox.

also how has your water temp been? i have been battling the heat all summer.