acropora dark spots

[Pfrd]

Hi guys my acropora it's become gain some dark spots are they bad or normal?
I think that is stn.



Anyone can help me...

 

[PaleHorse]

http://www.reefcentral.com/forums/showthread.php?t=2430841

good format......

 

[Pfrd]

1.Parameters- Alk, Cal, Mag,Salinity level,Nitrate/Trite, phosphate and ammonia.

Alk its flowting 6.4 and 8.2
cal 390
mag 1250
salinity 1,024
no2 0
no3 2
po4 0
ammonia 0
2. Water temperature.
i forgot my heater off but its 26 in the day anda i notice that is 24 at night
3.Lighting ? How long are the lights on and how how far away are they from the water surface and corals. Last bulb change if it applies.
i use led ocean revive 9 h of blue and 7h the others they are abouth 30cm from wather and a good 60cm from this psrticular coral
4.What do you do for water changes and at what interval do you perform them?
I use nsw 10% 2 times in a week and i use red sea salt once in a while
5. What salt brand?
red sea
6.Where do you get your water..ie ro/di, etc
ro/di watwer from my on tds 0
7.dosing anything currently- any additive/food.
i dose vodka
8. Tank equipment- power heads, skimmer, filtration.
une jebao wp4 and one su sun 3000lt/h
only use skimmer couse i dose vodka its a nano tank

my others sps are monti and they are very good only this my first and only acro is like that.

 

[PaleHorse]

have you tried to dip the coral in bayer to see if any bugs come off.

also be careful with alk changes like that. since everything else is growing fine it might just be bugs.

can you post a shot of the whole tank.

 

[Pfrd]

i got coralrx its that fine?
i dont see any pest at night but gona make a dip.

 

[PaleHorse]

yea thats fine.

i have gotten coral from some high end vendors that said they had no bugs.... guess what.... they had bugs lol.

 

[fishguy597]

Looks like you are getting some pink and green to me. What is it ? A possible shortcake?