Duncan corals

[Want to learn reefing]

My Duncan's keep closing for several days. I started with 6 heads and now have 12 . They're not huge but seem healthy most of the time. Any idea why they are closing up like this?

 

[Jekyl]

Parameters? Lighting? Tank pic?

 

[Want to learn reefing]

Parameters are good using usa current leds

 

[Want to learn reefing]

Parameters? Lighting? Tank pic?

Parameters are good I am using USA current LED lights

 

[reeferKen]

Mine close to closing doors, vibration, other times i never knew but a water change would bring them back out. I'd like to know too

 

[Jekyl]

The numbers may help. It's either your parameters, lighting, flow or pest.

 

[Want to learn reefing]

Lights are in night mode but this is it

 

[Want to learn reefing]

The numbers may help. It's either your parameters, lighting, flow or pest.

Serenity is 1.026 ph 82 calcium 420 nitrate .05

 

[Want to learn reefing]

Serenity is 1.026 ph 82 calcium 420 nitrate .05

Mag is about 1400

 

[Jekyl]

How old is the tank? Have them in direct flow?

 

[Want to learn reefing]

The tank is about 2 years now and no they are not in direct flow. I have mostly softies and they are thriving

 

[Want to learn reefing]

I've been spot feeding them and they were opening and actually putting on new heads . They closed yesterday and today. A couple of the heads opened a little today

 

[vetteguy53081]

Mag is about 1400

1300 is best

 

[reeferKen]

a 100 percent water change would be an easy experiment.

 

[Want to learn reefing]

Yeah it's a little high doing a 25 percent water change tomorrow

 

[Want to learn reefing]

a 100 percent water change would be an easy experiment.

I have a 120 gallon tank dont have enough water for a 100 percent change

 

[Want to learn reefing]

The numbers may help. It's either your parameters, lighting, flow or pest.

I've had a sail fin tang packing around them after I feed them. Could that be the cause and any suggestions on the feeding

 

[vetteguy53081]

These are fairly easy coral. First thing I see is location. On the sand does not do well as PAR is lower but mainly is that they get irritated easily if sand reaches them. I would elevate a little assuring it gets moderate light and water flow.
Additionally:

Temp 77-79
ph 8.1-8.3
salinity 1.025
nitrate < .04
Phosphate < .04
alk 8-9
Mag 1300
CA 440

 

[Want to learn reefing]

These are fairly easy coral. First thing I see is location. On the sand does not do well as PAR is lower but mainly is that they get irritated easily if sand reaches them. I would elevate a little assuring it gets moderate light and water flow.
Additionally:

Temp 77-79
ph 8.1-8.3
salinity 1.025
nitrate < .04
Phosphate < .04
alk 8-9
Mag 1300
CA 440

They are actually on a rock several inches above the sand my parameters are what you said except the mag is a little high.

 

[vetteguy53081]

They are actually on a rock several inches above the sand my parameters are what you said except the mag is a little high.

any little bugs on them upon inspection? Mine are super happy always and each head larger than a silver dollar