Does UV deplete trace elements?

TWYOUNG

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After struggling unsuccessfully for months to boost my trace elements despite steadily increasing dosing I observed a huge increase in the levels of several after being advised to turn off my 40W UV unit. Does UV deplete levels through some ionization process? I also was advised to add zeolite to my sump and remove chaeto. Can you shed some light on what’s going on here Randy?
 

Randy Holmes-Farley

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I don't think we have appreciable data to answer that question. There are many possible factors, from oxidation in the UV to change the form and solubility of some trace elements, to changes in microorganisms and maybe even available nutrients (from dead bacteria) provided to larger organisms that never passed through it.

Which trace elements? IMO, iron might be one of the likely once that may become less soluble passing through a UV.
 

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I don't think we have appreciable data to answer that question. There are many possible factors, from oxidation in the UV to change the form and solubility of some trace elements, to changes in microorganisms and maybe even available nutrients (from dead bacteria) provided to larger organisms that never passed through it.

Which trace elements? IMO, iron might be one of the likely once that may become less soluble passing through a UV.
Good morning Randy, so a question on this topic. With the idea in mind that it may/may not effect trace elements, what would your recommendation be on the usage of a UV sterilizer? I have always left mine on 24/7, but if periodically leaving off would be more beneficial than not, I am certainly willing to give it a go.
 

Randy Holmes-Farley

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Good morning Randy, so a question on this topic. With the idea in mind that it may/may not effect trace elements, what would your recommendation be on the usage of a UV sterilizer? I have always left mine on 24/7, but if periodically leaving off would be more beneficial than not, I am certainly willing to give it a go.

I personally never wanted to use one since I did not have apparent disease issues and was organic carbon dosing. I did not want to grow bacteria to feed filter feeders just to have them killed in a UV.
 

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I personally never wanted to use one since I did not have apparent disease issues and was organic carbon dosing. I did not want to grow bacteria to feed filter feeders just to have them killed in a UV.
THank you, I never thought about this from that perspective, but it makes absolute sense to me.
 
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TWYOUNG

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I don't think we have appreciable data to answer that question. There are many possible factors, from oxidation in the UV to change the form and solubility of some trace elements, to changes in microorganisms and maybe even available nutrients (from dead bacteria) provided to larger organisms that never passed through it.

Which trace elements? IMO, iron might be one of the likely once that may become less soluble passing through a UV.
After starting Reef Moonshiners in January and increasing dosing each month by 50-100% I ended up adding 15-30 mls daily of numerous elements to my 135g system due to continued low levels. After following Andres' advice and turning off my UV, as well as removing cheato and adding zeolite last month, cobalt, iron, nickel and barium skyrocketed. Manganese is the sole element remaining low despite heavy dosing. His suggestions have certainly proved beneficial but I'd like to better understand the process. Don't get the purpose of zeolite either as it's not for nutrient reduction. btw I also carbon dose with vinegar!
 

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After starting Reef Moonshiners in January and increasing dosing each month by 50-100% I ended up adding 15-30 mls daily of numerous elements to my 135g system due to continued low levels. After following Andres' advice and turning off my UV, as well as removing cheato and adding zeolite last month, cobalt, iron, nickel and barium skyrocketed. Manganese is the sole element remaining low despite heavy dosing. His suggestions have certainly proved beneficial but I'd like to better understand the process. Don't get the purpose of zeolite either as it's not for nutrient reduction.

I personally do not see a reason to use a zeolite in a reef tank unless it is simply a convenient place to grow bacteria. I do not know why they recommend it. I don't agree with the premise of some of the old zeovit reasons to use them, relating to ammonia.

macroalgae uses lots of trace elements.
 
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TWYOUNG

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I personally do not see a reason to use a zeolite in a reef tank unless it is simply a convenient place to grow bacteria. I do not know why they recommend it. I don't agree with the premise of some of the old zeovit reasons to use them, relating to ammonia.

macroalgae uses lots of trace elements.
What's puzzling to me is that tons of reefers use UV. Plus algae reactors and such commonly in use would seem more aggressive than my ball of chaeto. It's hard to argue with empirical results however, and the actions of UV and chaeto removal, possibly combined with something zeolite brought to the table seems to have led to dramatic effects in my system.
 

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What's puzzling to me is that tons of reefers use UV. Plus algae reactors and such commonly in use would seem more aggressive than my ball of chaeto. It's hard to argue with empirical results however, and the actions of UV and chaeto removal, possibly combined with something zeolite brought to the table seems to have led to dramatic effects in my system.
I have a large uv (largest I could get) 120 watt. I have manufacturer recommended flow through at 1100 gph for treating parasites. I dose trace elements (Right now using Prodibio Coral colors trace elements). I'm also dosing manganese and chaetogrow as I have an algae turf scrubber and it lets me know when I ran out of something as the algae all bleaches out white on the screen. That said, between using chaetogrow and trace element dosing I have no issues growing macro algae in the turf scrubber, using the UV, and dosing trace elements for corals. I keep tons of SPS - acropora, monticap, cyphastrea, tons of hammers and frog spawn, all growing crazily, and I have some orange yuma and I have BTAs, that also reproduce and grow big relatively rapidly (seem happy not angry). I feed heavily as well, 10+ cubes of food per day + a sheet of nori.


Obviously anecdotal, but I don't see signs of missing trace elements. Maybe the food contains trace elements as well that gets trapped in the water column?
 
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TWYOUNG

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I have a large uv (largest I could get) 120 watt. I have manufacturer recommended flow through at 1100 gph for treating parasites. I dose trace elements (Right now using Prodibio Coral colors trace elements). I'm also dosing manganese and chaetogrow as I have an algae turf scrubber and it lets me know when I ran out of something as the algae all bleaches out white on the screen. That said, between using chaetogrow and trace element dosing I have no issues growing macro algae in the turf scrubber, using the UV, and dosing trace elements for corals. I keep tons of SPS - acropora, monticap, cyphastrea, tons of hammers and frog spawn, all growing crazily, and I have some orange yuma and I have BTAs, that also reproduce and grow big relatively rapidly (seem happy not angry). I feed heavily as well, 10+ cubes of food per day + a sheet of nori.


Obviously anecdotal, but I don't see signs of missing trace elements. Maybe the food contains trace elements as well that gets trapped in the water column?
My issues were with chronically low element levels so any trace elements in food would only help. You say your tank is doing great so I wouldn't be concerned about trace element levels but have you ever actually tested them? I've been using Oceamo MS tests since starting Reef Moonshiners in January and it's one of very few companies who's equipment measures very low levels of several trace elements.
 

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My issues were with chronically low element levels so any trace elements in food would only help. You say your tank is doing great so I wouldn't be concerned about trace element levels but have you ever actually tested them? I've been using Oceamo MS tests since starting Reef Moonshiners in January and it's one of very few companies who's equipment measures very low levels of several trace elements.
I dose manganese based on Randy's feedback that most algaes consume manganese rapidly and I've got gonipora. 2 4-5" Colonies. One Red and one white, and an Alveopora colony that's growing by the day. I want to make sure they have enough manganese.

I do an annual ICP Test, which I skipped last year. But should do one just to confirm. Usually it confirms my phosphates are high and manganese is undetectable. Heh. But, I need to do one. I've not used Oceamo. I always use the Triton ICP tests. I like being able to look back over the years to see what stats were last year compared to this year.
 

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