White patches on encrusting monti

[Firestarter]

Noticed my encrusting monti beginning to show signs of white patches.

Anyone experienced this before?

NO3 5PPM

CAL 400-420

KH 11

Temp 26.5-27.5

Sal 1.026

Daily dripping of seachem kalkwasser.

Is this due to unstable kh or pest attack?

All other sps are doing ok and some have started to colour up.

Have attached a pic.

[Firestarter]

Pic attached

[netviper]

Sometimes it might be aefw attack. Try spotting them after lights off using a torch light.

Sent from my Galaxy Nexus using Tapatalk 4

[Firestarter]

Thanks will do it tonight. Will a fw dip help to kill the aefw?

[netviper]

Not too sure. Better to use proper dip like coralrx.

Sent from my Galaxy Nexus using Tapatalk 4

[barnacle]

Could be attack by nudibranch...

[Firestarter]

Thanks for the comments guys, but does the affected area look like bite marks or problems with my water params?

So that I can know which direction to look at to resolve the problem.

Tried looking for flatworms just now while the tank is still dark but didnt spot anything.

[netviper]

It does look kinda like bite marks.

Sent from my Galaxy Nexus using Tapatalk 4

[Firestarter]

Just did an iodide dip with tank water. Tiny specks of stuff fell off which are too tiny to tell if they were nudis or dirt. Will continue to monitor.

[james72]

Any small white hairy creatures appearing after 2 hrs lights off?

[Firestarter]

Any small white hairy creatures appearing after 2 hrs lights off?

Camping up later to find out!

[Firestarter]

As of today, the 'spreading' seems to have stopped.

Did not notice any white hairy creatures after lights off. Have began to see some signs of recovery. Hope I'm not imaging things!

[erikokelf]

[Firestarter]

The coral seems to be recovering. Pic attached for records.

[Firestarter]

Pic update. Coral seems to be recovering well. White patches have started to colour up again.