Zoa issue

[Aboogie]

So I been reefing for a year now. Most of my LPS are doing great and growing but some aren't. I have zoa's that were doing great and growing and then now they either not opening, slowly dying or dead. My numbers are where they should be so I can't explain how they are once doing great and growing and now they are gone. Any suggestions would be great.

Reefer 250
Temp 77.3
PH 8.26
Salinity 33 PPT
Alk 8.41
Calcium 412
Mag 1360
Phos .06

 

[SteveDola]

water changes! many water changes.

run carbon and double check your refractometer's accuracy. Prolly a good idea to take a sample of water to LFS for tests. Sometimes home testing is inaccurate, trust me.

 

[dz6t]

Water change is the solve-all-problem solution.
Please don’t fall for those no water change methods.
Lets say, online vendors don’t like to sell salt as it has poor profit or no profit at all. On the other hand, those additives fetch very large profit.

 

[dz6t]

Back to the zoas question, give them a dip with Seachem reefdip normally will solve the problem.
There are several major reasons that can cause what you described:
1. Zoas eatting nudibranch.
2. Bacteria infection
3. Toxins in the water
Seachem Reefdip is iodine, you can use iodine from CVS as well. Iodine will irritate nudibranch and let them fall off the zoas. If you see them, dip the zoas with Salifert flatworms exit.
If it is bacteria infection, iodine will take care of it.
After dipping, do a 25% water change.

 

[nickeg79]

Chemiclean gets them to open but you need to fix whatever the problem is

 

[tkyee98]

Your salinity looks a little low, where are your nitrates sitting at as well?