Zoos are closing what up

[bigj51]

Well my zoos started closing up about 2 weeks ago. now they are all closed. I did a 10 gal water change yesterday and they are still closed. I have a 55g reef w/ 4 65w PCs, two are actinic blue and 2 are 50/50. About a month ago I changed from 10000k bulbs to the 50/50. About two weeks after that the zoos started closing. I tested my water and got:

500 calcium
11 carbonate hardness
8.4 ph
.025 salinity
0 phosphates
5ppm nitrates
0 nitrites
0 ammonia

I add 1/4 teaspoon of calcium and carbonate on alternating days except sunday. I have an automatic topoff of RO water. I have no idea whats wrong and nobody else seems to know

[Mrs.kbmdale]

What else is in the tank? Anything nearby that could be irritating it? Have you noticed anything ON the zoo's, like maybe a snail with a neat looking shell? Your calcium seems just a tad bit too high, but that's just my opinion. They may not have liked the llighting change, but I don't see that as the solution since you didnt switch up to something stronger. And I'm assuming you did mean 1.025.
You might get a better response over in the Zoanthid forum.

Brianna:rollface:

[anjieburdett]

I had the same problem - i found out what was causing my Zoo's to close though. My Lemonpeel!! Stupid mistake on my part, putting something in my tank that my fish thought was yummy.

Anjie,x.

[bigj51]

the zoos had their own spot. put them all in the middle of the tank in the bottom quarter of the tank. I dont the snails on them but i have seen crabs on them. im upgrading to a 120 this week and the lighting will change i guess ill just let them be until the change