SPS turning green and bleaching corals!

[Scotteh11]

Hey guys
Was looking for some help I've had alot of my sps corals bleach and alot turn green and I'm trying to figure out the route cause!
I made the mistake of making a few changes at once, I've recently changed from kessils to a t5 kessils combo and changed my 2 part
Now using fauna Marin dosing I over dosed my calc to 500+ and my all dropped from 9.6 to around 7.7/8
The t5 kessils combo I started with just an hour a day of t5s slowly increasing to a 6hour period with kessils running from 10hours maxing out at 20%

Salinity 1.026
PH 8 8.1
Temp 25.8 to 26
Alk
Calc 500+
Mag 1450
Phosphate 0.03
Nitrates 5ppm

I'm currently not running any gfo or carbon just a skimmer and a nitrate reactor

I've attached some pics and a graph of temp and ph fluctuations

Appreciate any feedback or advice where or how to move forward

Scott

 

[Neoalchemist]

What size tank and how old is the tank?
Are these the first acros in the tank?

 

[Scotteh11]

The tank is about 6 months old and approx 440L they've been in the tank about 2months and growing well and encrusting. My lps have been sulking too

 

[JordanS01]

Any better pics of the sps, to me the green part looks like bare skeleton

 

[Scotteh11]

It's hard to get a decent picture, you can still polyps in bits

 

[Bryknicks]

Did this occur after the cal/alk changes? The green part looks like the skeleton covered in an algae film. What do you normally keep your cal/alk levels at before the change? That is most likely the cause if they frags were growing beforehand, the change in those levels over too quick a period of time.

 

[Scotteh11]

Yeah well I was worried about the changes in light and 2part dosing at the same time. Preciously I was running at about 400calc 9.6dkh then just due to obviously not keeping up with my alk consumption within a few days I was down to 7.7dkh. would that sort of change do this? I was unsure if I was starving my corals with my phos being so low or if I'd done the damage from my changing in lighting?

 

[Bryknicks]

I recently added T5's to my LED's and did not have any issues with any coral. I wouldn't rule it out but its unlikely. If the coral were phos/nitrate starved, they would lose color by browning out and not RTN/STN like your experiencing. I see you said that the alk change occurred over a couple of days, was it the same for calcium or did that occur rapidly?

 

[Scotteh11]

With adding T5s to your LEDS what sort of intensity do you run your LEDS at in comparison to before? I say a few days but it may have been sooner on both counts, I found myself that focused on the light changes as the impact my monitoring of my alk and calc lacked consistency. With my alk consumption being approx -0.5dkh a day I had assumed I'd of had time before any harm was done. My LPS are still sulking and had receded right back and I thought they wouldn't have been so affected by the drop in alk as much(not sure of the affects of my high calc). Any opinions of the fluctuations of my display tank temp too as shown by the picture from my temp probe from my apex?

 

[Bryknicks]

I have the photon V2 running at 80% over my tank. Although I have a 24" tall tank and lights off the tank about 10". What were you running yours at? The daily temp swings are normal and within range.

 

[JordanS01]

This all started with light changes? The SPS seem to have receded for sure and usually that happens when something went off in the water. Temp wise I don't really believe as in the summer months my tank reaches a high of 84-85 without heaters as well and everything is fine including acros.

 

[Scotteh11]

This all started with light changes? The SPS seem to have receded for sure and usually that happens when something went off in the water. Temp wise I don't really believe as in the summer months my tank reaches a high of 84-85 without heaters as well and everything is fine including acros.

Yeah I made the mistake of changing my dosing formula at the same time too! Switching from brightwell part a and b to fauna Marin bailing lite.

I'm running 4 t5s approx 10" of the tank as I've just lowered them cross, 3x blue+ purple+ and 2 kessils on goosenecks at 20%intensity. I don't have access to a par meter. My tank is 24" deep