Alexander1312
Supporting Member
Takes out your traces and (can) release stuff that inhibits coral growth. Does not sound free to me
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Bunch of coral dying
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.Takes out your traces and (can) release stuff that inhibits coral growth. Does not sound free to me
Activated carbon doesn’t particularly strip out trace elements. Some people say it does, but it’s not a quantitatively significant amount, and nothing compared to the benefits it brings with removing unwanted organics.
Alexander1312
Supporting Member
Since it is very beneficial overall to use GAC (granular activated carbon) 24/7 from an organics perspective, as John said, my take on this in a bit more detail:
- The impact could be more problematic if no trace element dosing and water changes are being performed. I assume the concerns came from folks who wanted to avoid water changes overall, moonhiners etc, so this needs to be considered when this is not your regular practice - still not a deal breaker IMO.
- The impact is greater if too much GAC is used. Even with ozone, when you almost have to use GAC (removing potential bromate from the water column), I only use approx 50% of GAC recommended.
- Impacted traces can be iodine, copper or molybdenum. All three are rather important for different reasons, so watching them would be a good idea but an easy fix.
Thank you both @JVU & @Alexander1312 for your input on this. I do have carbon. I have been leery in deploying in only that in the past I have been very deficient in certain trace elements -namely iodine..So hopefully the ICP will come back soon. Right now things have stabilized and all coral seem to be ok.. so take no further action without input
TheRealMadMax
Supporting Member
One issue I ran into when deploying large WC to deal with high phosphate levels was nutrient deficiency. A lot of my feeding is automated so when doing a number of WC events all the coral started to suffer.
Well I think the issue is a serious deficiency of fluorine per ICP test?
It is at .59 vs 1.2 recommended guideline. Looking up the deficiency would explain sudden RTN of corals.
Everything else looking pretty much ok Although Lanthanum came in at 3.44. Tin came in st 5.44 and silicon at 81.
It is at .59 vs 1.2 recommended guideline. Looking up the deficiency would explain sudden RTN of corals.
Everything else looking pretty much ok Although Lanthanum came in at 3.44. Tin came in st 5.44 and silicon at 81.
Coral reefer
Past President
What if any ideas do you have on how this happened?
I kinda doubt low Flourine is your problem (at least not only this) - my F result on ICP is usually about the same, sometimes lower.
Tin on the other hand - that’s typically considered to be a problem. The fact it’s in your water at all is a concern. Did you already check all equipment for metal corrosion?
I looked at various pumps from the outside but have not had the time to seriously rip them apart. Read something called -poly filter can help (and change color) -not sure if legit or not?
I’ll have to look back at my other reports and see if this is new or I just missed the boat on this.
Except for lanthanum -no clue..
Whatever it is though -it’s been present since sept and increasing. Hmm.
The tin? Yeah if so that is likely your problem. I think it usually comes from some metals corroding somewhere but I suppose it could also be a bad batch of salt or something.
Can NSW have tin???
It was much higher previously in November (11) vs now so I am trying to recall what I changed…
I've used poly filter a lot when i had brass corroding in my sump, it did help a lot with removing copper and zinc and it also changes color when absorbing copper. Not sure about other metals but they do have a lot of articles on their website explaining how this thing works. Another that i had luck with is triton detox, it's also labeled to remove copper but does have effect on other heavy metals
Alexander1312
Supporting Member
Can you post your full results?
Frag racks, metal hose clamps, also other things that can be suspect. Heck even a loose screw that fell in or a rusty tank screen. Even HVAC vents above the tank or canopy hinges.
Alexander1312
Supporting Member
Tin often leaches out of colored dosing tubes from a certain supplier of cheap versions of these. Also, frozen brine shrimp food often contains this (a reason I do not feed this).
NSW has up to 3 ug/L; everything above 10 ug/L is a likely reason of this to be the cause of SPS dying. A value of 5 ug/L should not cause a ton of issues standalone.
NSW has up to 3 ug/L; everything above 10 ug/L is a likely reason of this to be the cause of SPS dying. A value of 5 ug/L should not cause a ton of issues standalone.
Latest results plus mapping of fluorine and tin. Tin was decreasing when all this happened -so was the fluorine. Things didn’t really start until January as Tin was coming down.
Wondering if it was 1-2 punch.
But if tin is decreasing…
I need to see when I had switched water from NSW to AC and back again.
Wondering if it was 1-2 punch.
But if tin is decreasing…
I need to see when I had switched water from NSW to AC and back again.
