Encrusting coral issues

[chemaholic]

Hello!

I am seeing some issues with my entrusting corals. They have light or white spots on them. I have been working on getting my PO4 down so I thought that might be the issue but I wanted too see what you all thought.

Currently parameters are
Alk 9.37
Ca 392
Mg 1190
PO4 0.39 (treated it with PhosphatE to 0.05)
NO4 13.7

I carbon dose daily and I dose PhosphatE daily. I am still dialing that dosage in, but the PO4 was much lower this week than last.

I am dosing 10ml a day vodka. The tank is a 120g with sump so maybe 130g total.

 

[Rainblood]

I had a similar problem and found out that my asterina stars were munching on my encrusting sps.

 

[chemaholic]

Ahh! I had not considered that. I will start pulling them out of the tank. Thank you!

 

[billyocean]

Don't know how fast you pulled the p04 down but do so slowly. Too fast is no good. You may already know but figured I would chime in on it

 

[chemaholic]

You are always safe to assume I know nothing lol. Thank you for the info. I will try to make sure I do not go too fast. I am bad about being impatient.