Dust sticking to Zoa and other coral

[Shaiful Baker]

Hello all. do any of you guys know what it is?
i dip it, after few days it comeback. i blow it with turkey blaster, after few days, it come back. any help would be appreciated.
Thanks
tank parameter:
dKH 8.4
salinity 1.025
no3: 10
po4: 0.03

 

[blaxsun]

I don't think that's dust.

 

[ying yang]

I dont think it's dust either as they all star shaped and all same shape

 

[kittenbritches]

Time to get out the Bayer.

 

[N.Sreefer]

Whoa been reefing for years and never seen anything like that @ReefSquad @vetteguy53081

 

[vetteguy53081]

Oh no - Looks like flatworms.
At times, and I say at times, dipping will work. The problem you will face when the battle is won is the presence of eggs which are very tiny and need to be physically scraped off. The pic shows their fvorite location- The base of the coral. The smother the base and feed off tissue and block the light that the coral need to produce their energy source known as zooxanthellae.
To battle, Using a 3/8" tubing siphon them up. If just too many, other option is addition of wrasse which will eat them such as : Yelow coris , 6 lined, lunare, and melanurus.
Other option is chemically using salifert flatworm exit. With this product, treat at 90% of recommended dosage and you will need to siphon bedding daily as the dead ones can emit toxins.

 

[blaxsun]

I like the biological suggestion, ie: wrasses.