This STN or Bleaching?

[pjdiddy]

Parameters are stable. The only changes I recently I made is add a bicolor blenny, add a refugium (light, Chaeto and live rock, and bumped my Hydras from 50% to 60%.

So far, I turned off the light of my refugium and turned down the Hydras to 40%.

View attachment 20181015_160339.jpg

 

[speedstar]

Parameters are stable. The only changes I recently I made is add a bicolor blenny, add a refugium (light, Chaeto and live rock, and bumped my Hydras from 50% to 60%.

So far, I turned off the light of my refugium and turned down the Hydras to 40%.

View attachment 20181015_160339.jpg

looks like STN if your talking at the base. How is the flow?

 

[pjdiddy]

It is on a 40 breeder and has 2 mp10s on random flow via Apex. Polyps are sways so I guess it has enough flow.

I also double check the parameters and nothing is out of wack. Is it possible the blenny nipped on it? Saw it couple of times nipping on other corals.

 

[pjdiddy]

Here is a better picture. And also, couple other corals seems ticked off.

View attachment 20181015_163645.jpg

 

[pjdiddy]

Here are the other two. Other than that everything seems happy.

View attachment 20181015_163658.jpg

 

[pjdiddy]

There is also this guy. He has nicr colors couple days ago.

View attachment 20181015_164225.jpg

 

[29bonsaireef]

What's your alk at?

 

[speedstar]

Does the bleaching align with where the lights hit it strongest? I missed it in your first pic, thought you were talking about the base. If the spots were smaller id fear bites from flatworms but they seem bigger and not making trails

 

[Will Wohlers]

First pic I immediately thought flatworms but with the rest of the pics looks more like the after effect of an alk swing.

 

[pjdiddy]

Alk is 7.8. Been bouncing between 7.8 and 8.0 since forever.

 

[pjdiddy]

First pic I immediately thought flatworms but with the rest of the pics looks more like the after effect of an alk swing.

I thought at first it is alkalinity swing but tested it and it was the same from last week. Using 2 parts through doser.

 

[pjdiddy]

Does the bleaching align with where the lights hit it strongest? I missed it in your first pic, thought you were talking about the base. If the spots were smaller id fear bites from flatworms but they seem bigger and not making trails

The white parts is actually behind where it gets hit by the light.

 

[29bonsaireef]

If alk has been stable I would suspect the increase in lighting may have burned them. Is No3/P04 low in your system?

 

[pjdiddy]

If alk has been stable I would suspect the increase in lighting may have burned them. Is No3/P04 low in your system?

No3/P04 is not low and not high last week I tested them.

I remember experiencing the same thing when I tried to run bio pellet reactor few months ago.

Added the refugium in my sump just last week to improve my ph swings during the evening. I will test them again soon as I get home.

 

[speedstar]

Have you dipped to check for bugs?

 

[Charlie’s Frags]

How high are your hydras mounted? I believe the increase in intensity burned them. I had many issues with acros when I was screwing around with my hydras. Bio pellets, carbon dosing and gfo also destroyed thousands of dollars worth or sps. I raised my lights to 16” above the water, stopped changing my settings and got rid of no-pox, gfo, bio pellets etc.

 

[pjdiddy]

Have you dipped to check for bugs?

Not yet, I ran out of Bayer. I should buy a new one and do that.

 

[pjdiddy]

How high are your hydras mounted? I believe the increase in intensity burned them. I had many issues with acros when I was screwing around with my hydras. Bio pellets, carbon dosing and gfo also destroyed thousands of dollars worth or sps. I raised my lights to 16” above the water, stopped changing my settings and got rid of no-pox, gfo, bio pellets etc.

I have them on a Aquatic Life Hybrid 8 inches high. You think adding the fuge stressed them out? Or the 10% intensity increase did it?

 

[cracker]

I think your on to something with the lights.Could be the changes . You have changed to 3 differing levels so far far right?

 

[pjdiddy]

I think your on to something with the lights.Could be the changes . You have changed to 3 differing levels so far far right?

Yeah started from 40, 50, 60% span of 6 weeks.