White spot on Acro and STN

[rongy]

Hi, couple of my acros frag are having STN recently. When I took them out for dip, I’ve noticed white spots on green slimmer, tried blow them with turkey blaster, but doesn’t come off. They still have good polyp extension throughout the day.
Here’s my parameters for reference:
Salinity: 1.026
Nitrate: 10
Phosphate: 0.06
Calcium: 410
Alk: 8.3 (raised from 7.3 in a week with brs 2part in two doses)
Mag: 1290
PH: 8.15

 

[Reeflix]

do you have flatworms in there? kinda looks like munch marks...

 

[billyocean]

I agree on the bite marks. If so..that would be AEFW

 

[rongy]

do you have flatworms in there? kinda looks like munch marks...

I’m not sure. I’ve never seen flatworms in my tank, but it’s possible that they hide somewhere. I’ve also dipped the sps in CoralRx and Iodine, but nothing felt off.

What’s the chance that flatworm bites one coral but hides in another?

 

[Reeflix]

I dont know about Iodine, but coral RX doesnt kill the flatworm eggs (please correct me if im wrong) so...

 

[Reeflix]

I’m not sure. I’ve never seen flatworms in my tank, but it’s possible that they hide somewhere. I’ve also dipped the sps in CoralRx and Iodine, but nothing felt off.

What’s the chance that flatworm bites one coral but hides in another?

you should go over to your tank and see if you see any eggs or bite marks. I think the actual flatworm is pretty hard to notice. also how many arcos do you have? they dont mess with others