Sps sudden pigment loss

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Seemingly overnight half of my sps collection lost nearly all pigmentation. It’s mostly visible in my green slimer and forest fire Digitata as well as both of my montis (not pictured). All still have normal polyp extension and nothing else in the tank seems to be affected.
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Here are photos of the same colonies from three days ago (when I did my most recent w/c)
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If anyone has some insight as to what may be the issue here, please chime in!

Couple more things:
-This has happened once before and it took nearly a month for the colonies to regain pigment.
-As seen in the photos; the colonies of stylophora are seemingly unaffected
-One frag of the green slimer fared a bit better than the mother colony and other frag
-I’ll be getting bottled zooxanthelae in a couple days unless anyone else suggests a better course of action
-I will post all aquirable water parameters shortly
 
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Im not sure what “shortly” is but it sounds like a problem with either the “Big 3” (Mag,Alk, Cal) or nutrients becoming stripped by GFO or carbon dosing.
 
I agree, it’s what I was thinking.
 
Im not sure what “shortly” is but it sounds like a problem with either the “Big 3” (Mag,Alk, Cal) or nutrients becoming stripped by GFO or carbon dosing.

Sorry, ‘shortly’ meaning as soon as I can get home, perform the tests and post them back on here. Shouldn’t be more than an hour. I unfortunately don’t have a mag test kit. No GFO or carbon dosing. Nitrates & phosphates nearly always read undetectable with an API year kit.
 
0 phosphates and 0 nitrates maybe the reason for loss of color
 
. Nitrates & phosphates nearly always read undetectable.
Their is the problem. You are slowly starving your coral. I would personally bring the nitrates up. Most guys would keep them around 5. Phosphates are also a key “color keeper” and most guys recommend .02ppm

Do you feed The corals at all?

-Zack
 
Here they are:
Dkh-5 (api)
Ca-460 mg/L (api)
Ph- 7.7 (salifert)
NO3 & PO4- undetectable (api)
Salinity- 1.026
 
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Their is the problem. You are slowly starving your coral. I would personally bring the nitrates up. Most guys would keep them around 5. Phosphates are also a key “color keeper” and most guys recommend .02ppm

Do you feed The corals at all?

-Zack

This system has been running ULN since I got it running. (I can’t seem to get them up). I feed AcroPower 2x per week, Fuel 2x per week, phyto 1x per week, and Justin Credible’s Goniopower 1x per week. I’ve also been using Coral Vitalizer by korralen zucht for nearly a year.. I’ve gotten great polyp extension as a result.
 
Yep .1 phosphates and 5 ppm for nitrates

Tank gets fed twice a day (keep in mind it’s only a 30g) and nutrients never bump up.. I changed my w/c schedule to 15% 1x per month and have turned off my skimmer for weeks on end with no avail.
 
Lower light intensity till you get some nitrates.

I’ve got next to no algae in the tank so I’m not sure how reducing light would raise nitrates.. (not that I could anyway.. light isn’t adjustable)

Anyone know if stray voltage could have an effect on coral like this? I found my fuge light taking a little swim
 
While I do acknowledge that I would have better coloration with a bit higher nutrients, I don’t believe that this rapid loss in pigment would be due to something that is a constant in the tank.

Everything has a breaking point. Something doesn't die until it dies, up until that moment you can swear "well, it's been that way for x, why would it be different now".

Perpetually starving your tank isn't ideal. This can be fixed by purchasing kno3 (potassium nitrate) and phosphorous (Seachem Phosphorous is nice). For kno3, I recommend a FW planted fertilizer over Spectracide. I found Spectracide to have a chemical scent that worried me, and FW planted people are just as picky as us, their ferts are often exceptionally pure. I like NilocG for potassium nitrate.
 
I’ve got next to no algae in the tank so I’m not sure how reducing light would raise nitrates.. (not that I could anyway.. light isn’t adjustable)

Anyone know if stray voltage could have an effect on coral like this? I found my fuge light taking a little swim

That's not what he's saying. Okay, there's a whole bunch of reading that needs to be done on your end. I'm going to give you a basic rundown of what goes on in our tanks, and how one thing leads to another.

Firstly: He's telling you to lower your lights until you have more nutrients because your corals may be getting burned from 'too much light' -- But why does that have anything to do with Nitrates? Too much light is too much light, right?

No. It's not.

Light is relative to Nutrients. Nutrients are relative to light. This means if your tank had nutrients, your same exact lighting may not be too much. Conversely, if you have exceptionally high nutrients, your lights may be too low.. It's all relative, and linked together.

Second: Alkalinity is part of the equation. Alkalinity can be high or low, sure, but it's combated by relative light, and nutrients. Tanks with higher Alk and lower nutrients are more likely to be burned by the Alk concentration, regardless of light -- Which does NOT mean light DOESN'T matter.. It's just another wrench in the equation.

Third (just to emphasize the complexity): Flow is ALSO part of this in general -- Not necessarily in your case right now, but in general it's part of the equation.


Taking care of a reef is like a pyramid. You need to start with the foundation, and the foundation needs to be balanced so that layers can be built upon one another. The triangle of Lights / Alkalinity / Nutrients must be in order for you to build up to the next tier of issues. Such as Flow, trace, feedings, then further, and so on.

Now what needs to be cared for AFTER the triangle of Lights/Alkalinity/Nutrients is all up to interpretation. But without those three things in check, you're going to have trouble with the entire pyramid that is your system.

When you read about people dosing trace elements, people talking about dosing amino acids (protein compounds), feeding, etc etc.. That type of stuff is very high up on the pyramid. And it's all good stuff to know, but frankly, there's a LOT of information you need to learn before that point.

Basic math analogy here -- Newer reefers jump in the deep end, and decide they really, really need to learn Calculus. The problem is, they never learn how to add and subtract first. You can't take calculus until you understand the basic foundations.

So my advice here, some basic ideas, some basic number chasing.

Step 1: Read everything you can. Ask questions. Look for correlations. Watch for reactions to actions -- What do I mean?

Here's an example -- Count the number of threads in the SPS section that start like this "HALP I can't SPS", inside the thread it always goes like this, every single time. "okay, here's my parameters ---> 0 nitrates, 0 phosphates"

That's a trend you should notice. That's one of the many, many examples that you can see here dozens of times per day.

Step 2: These are basic numbers, make these happen slowly
no3: 2-5ppm
po4: 0.05ppm
dKH: 7.5-8

Step 3: Buy kn03 (I like NilocG), buy Phosphorous (I like Seachem Phos).

Step 4: Worry about the foundation. Not the tip of the pyramid.
 
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Think it was missed that your Alk is very low if that is correct. What is it normally?

With no nutrients that number is okay. If he had some nutrients then yes I would agree. But 0,0 5alk is okay 5,.1/ 6-7.5alk. My tank is 2,160 and 9-10alk. It’s all evens out
 
That's not what he's saying. Okay, there's a whole bunch of reading that needs to be done on your end. I'm going to give you a basic rundown of what goes on in our tanks, and how one thing leads to another.

Firstly: He's telling you to lower your lights until you have more nutrients because your corals may be getting burned from 'too much light' -- But why does that have anything to do with Nitrates? Too much light is too much light, right?

No. It's not.

Light is relative to Nutrients. Nutrients are relative to light. This means if your tank had nutrients, your same exact lighting may not be too much. Conversely, if you have exceptionally high nutrients, your lights may be too low.. It's all relative, and linked together.

Second: Alkalinity is part of the equation. Alkalinity can be high or low, sure, but it's combated by relative light, and nutrients. Tanks with higher Alk and lower nutrients are more likely to be burned by the Alk concentration, regardless of light -- Which does NOT mean light DOESN'T matter.. It's just another wrench in the equation.

Third (just to emphasize the complexity): Flow is ALSO part of this in general -- Not necessarily in your case right now, but in general it's part of the equation.


Taking care of a reef is like a pyramid. You need to start with the foundation, and the foundation needs to be balanced so that layers can be built upon one another. The triangle of Lights / Alkalinity / Nutrients must be in order for you to build up to the next tier of issues. Such as Flow, trace, feedings, then further, and so on.

Now what needs to be cared for AFTER the triangle of Lights/Alkalinity/Nutrients is all up to interpretation. But without those three things in check, you're going to have trouble with the entire pyramid that is your system.

When you read about people dosing trace elements, people talking about dosing amino acids (protein compounds), feeding, etc etc.. That type of stuff is very high up on the pyramid. And it's all good stuff to know, but frankly, there's a LOT of information you need to learn before that point.

Basic math analogy here -- Newer reefers jump in the deep end, and decide they really, really need to learn Calculus. The problem is, they never learn how to add and subtract first. You can't take calculus until you understand the basic foundations.

So my advice here, some basic ideas, some basic number chasing.

Step 1: Read everything you can. Ask questions. Look for correlations. Watch for reactions to actions -- What do I mean?

Here's an example -- Count the number of threads in the SPS section that start like this "HALP I can't SPS", inside the thread it always goes like this, every single time. "okay, here's my parameters ---> 0 nitrates, 0 phosphates"

That's a trend you should notice. That's one of the many, many examples that you can see here dozens of times per day.

Step 2: These are basic numbers, make these happen slowly
no3: 2-5ppm
po4: 0.05ppm
dKH: 7.5-8

Step 3: Buy kn03 (I like NilocG), buy Phosphorous (I like Seachem Phos).

Step 4: Worry about the foundation. Not the tip of the pyramid.
Very well said Rakie. A very clear explanation of a very complex subject.
 

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