Zoos aren't opening up

[dfowlks]

I have some zoos in my tank that are doing fine and then I have some that won't open. Well half of the colony will open but the other half stay closed. I tried moving the rock to different parts of the tank. The rock has about twenty polyps and the most I have seen open at one time are about 6 or 7. I have other zoos that are doing great. Any suggestions would be great.

 

[geoxman]

I would check for predators. Have you FW dipped them? Also what are your water parameters and lighting? good luck

 

[dfowlks]

Ammonia 0
Nitirite 0
Nitrate 0
PH 8.2
salinity 025

I removed a slug that looked like a nudibranch a few days ago. Lighting is 64 w PC. I have the 24 gallon aquapod with stock lighting. I do 1 gallon water change every week and add calcium and other elements once a week. My other zoos are doing great.

 

[geoxman]

Have you FW dipped them?? Calcium is not that important for zoos-JMHO
what other elements are you adding? Are you testing for these? Also what test kits are you using? Saliefert/Seachem will show a much different result than some test dip stick.

If you removed a nudi then you will likely have more! I would inspect and FW dip. good luck

 

[650-IS350]

Check at night with red light to see if you have large ampipods swarming your zoos at night 1 hr after the light turn off.... there have been lots of reports of zoos being attacked eaten by larger ampipods... my self included....