Ati icp low iodine

[Lasse]

I had similar problems with sad corals - my Hanna show 0.1 ppm - Triton test 0.018 - change to a new phosphate ULR - still 0.1 - still sad corals - send a new Triton test 0.015 ppm. Check with a Hanna that I know to show similar as Triton - 0.02 ppm. Start to dose PO4 - corals look happy nowadays

If your ULR phosphate shows 2 ppb - remember that the accuracy at 25 degree C is plus minus 5 ppb PO4-P. Your result can be between 0 and 7 ppb PO4-P - 5 ppb PO4-P correspond to plus minus 0.015 ppm PO4

Sincerely Lasse

 

[Michael Gray]

I had similar problems with sad corals - my Hanna show 0.1 ppm - Triton test 0.018 - change to a new phosphate ULR - still 0.1 - still sad corals - send a new Triton test 0.015 ppm. Check with a Hanna that I know to show similar as Triton - 0.02 ppm. Start to dose PO4 - corals look happy nowadays

If your ULR phosphate shows 2 ppb - remember that the accuracy at 25 degree C is plus minus 5 ppb PO4-P. Your result can be between 0 and 7 ppb PO4-P - 5 ppb PO4-P correspond to plus minus 0.015 ppm PO4

Sincerely Lasse

This morning it was 7ppb. So it's up. I'll watch it. Dont wanna over do it so I'll see what it is tomorrow before another. 5ml dose

 

[Lasse]

Be aware f the fact that if you have a high population of photosynthetic organisms in your aquarium - the PO4 level will alter between morning and just after the light have leave its max (or rather soon after).

Sincerely Lasse

 

[Pdash]

Be aware f the fact that if you have a high population of photosynthetic organisms in your aquarium - the PO4 level will alter between morning and just after the light have leave its max (or rather soon after).

Sincerely Lasse

Could you please clarify what you mean here? Thanks Lasse

 

[Lasse]

The biological production of PO4 is continuously during the whole day - light or dark. Heterotrophic bacteria produce PO4 and chemical reactions "produce" PO4 regardless of light or darkness. During the light period - photosynthetic organisms ( Zooxanthellae , algae and so on) consume PO4. If the biomass of photosynthetic organism is high (as in an aquarium with dense population of photosynthetic corals) and the daily feed input is low enough the consumption will be higher than the production during the light hours - it means that the PO4 concentration can be higher during dark morning hours compared with just after the light intensity has peaked. IMO - if you measure during the dark morning hours and get 0 you are in trouble - if you read something - you have reserves. If you measure your pH and it is total depended of the photosynthesis (no use of pH rising chemicals during the lighting period) - measure your PO4 around 1 hour after peak pH. If it is 0 - you are near the limits. IMO - the PO4 just after peak photosynthesis should be around 0.04-0.08 and steady. The PO4 concentration in the morning is of lower importance for me.

I hope I wrote this in an understandable way

Sincerely Lasse

 

[Pdash]

The biological production of PO4 is continuously during the whole day - light or dark. Heterotrophic bacteria produce PO4 and chemical reactions "produce" PO4 regardless of light or darkness. During the light period - photosynthetic organisms ( Zooxanthellae , algae and so on) consume PO4. If the biomass of photosynthetic organism is high (as in an aquarium with dense population of photosynthetic corals) and the daily feed input is low enough the consumption will be higher than the production during the light hours - it means that the PO4 concentration can be higher during dark morning hours compared with just after the light intensity is has peaked. IMO - if you measure during the dark morning hours and get 0 you are in trouble - if you read something - you have reserves. If you measure your pH and it is total depended of the photosynthesis (no use of pH rising chemicals during the lighting period) - measure your PO4 around 1 hour after peak pH. If it is 0 - you are near the limits. IMO - the PO4 just after peak photosynthesis should be around 0.04-0.08 and steady. The PO4 concentration in the morning is of lower importance for me.

I hope I wrote this in an understandable way

Sincerely Lasse

Wish I could like this post more than once, that addressed the issue perfectly. I've been measuring po4 in the morning for convenience (I also dont run macro algae) I tend to run relatively high right now, sps have good color and growth always looking for better I guess, .15-.2 usually below .2 though (measured with hanna ulr phosphorous). Maybe I'll do some tests in the morning and night for a couple weeks to see if I'm seeing consistent swings.

 

[steallife904]

I also had low iodine in my ATI reading. I started putting a low does amount into my auto top off water. Pretty much put a capful in everytime I refill the reservoir. no clue if it made any difference but I don't think it can really hurt. im dossing way under the recommended amount.

 

[Lasse]

I dose iodine (Salifert - even if I´m a Triton user) every day - sometimes I get good result in IPC readings - sometimes it is in the lower ranges. I have not seen any pros or cons with either reading but I still dose

Sincerely Lasse

 

[Michael Gray]

After making my calibration fluid as accurate as I can per @Randy Holmes-Farley fluid. I bought that new veegee refractometer and indeed I was low like ati showed. I calibrated it raised tank over alot of WCs. Now my tank shows 35ppt on my veegee. I tested my Milwaukee 1.025 fluid and it shows 1.025. But my new ati icp test came back as 33.83psu. Not 35. So I'm ordering two little fishies calibration fluid. This is crazy. Iodine is still low after all those WC too ahah

 

[DancingWind]

Here is my personal experience with Iodine. I run triton method. after first test my iodine was 0.01 ..way below recomended levels if you are keeping purple corals shrimp and cheto (tho milka was coloured just fine) so I decided to use AquaForest Iodine supplement. As I understand Iodine 'goes away' from tank quite rapidly - doubly so with some species of macro macroalgae i.e. everyone's favorite chaetomorpha (IIRC iodine is what makes cheto not tasty to fish)
It recommends 1drop/100L/day. I do ICP tests monthly. (triton every 3 months - MarinLab the rest)
with that dosage (6 drops/day for ~650l system) and after keeping to this schedule for a month I raised Iodine to 0.07+ (from 0.01). So I scaled down to 4 drops per day and now its 0.04-0.05 ... granted I have a lot of algae in refugium (20%) and do not drip 'every' day so it varies a bit, but I would recommend AF Iodine if you are fine dosing manually.

 

[Michael Gray]

I just need to get my hands on some official @Randy Holmes-Farley professional mixed 35ppt on the dot solution *cough* cause my mix didnt work or ati is wrong lol

 

[Pdash]

I just need to get my hands on some official @Randy Holmes-Farley professional mixed 35ppt on the dot solution *cough* cause my mix didnt work or ati is wrong lol

Kinda weird that you are having such bad issues, your salinity is low in your icp test, but it's not really that low. I've had the same exact number from the same company without ill effects to my acropora.

 

[Randy Holmes-Farley Verified Community Expert]

After making my calibration fluid as accurate as I can per @Randy Holmes-Farley fluid. I bought that new veegee refractometer and indeed I was low like ati showed. I calibrated it raised tank over alot of WCs. Now my tank shows 35ppt on my veegee. I tested my Milwaukee 1.025 fluid and it shows 1.025. But my new ati icp test came back as 33.83psu. Not 35. So I'm ordering two little fishies calibration fluid. This is crazy. Iodine is still low after all those WC too ahah

A sg of 1.025 in seawater corresponds to 33.1 ppt, not 35 ppt.

 

[NanoDJS]

I would suggest dosing " iodide "for what its worth never Iodine , its prob the fastest depleting trace, and very needed. You do not dose " Iodine"

 

[Randy Holmes-Farley Verified Community Expert]

I would suggest dosing " iodide "for what its worth never Iodine , its prob the fastest depleting trace, and very needed. You do not dose " Iodine"

I don’t know if it is needed in all cases, but I agree with what to dose and doing so and looking to see if there is a benefit is easy to do.

 

[Michael Gray]

@Randy Holmes-Farley i guess i need to remake a 35ppt solution as mine was as close enough i blame cheap scale from amazon.

 

[CreatiVe2]

@Michael Gray - I have experienced the same coral reactions as you, and have similar water parameters in my 1.5 year old mixed reef (250 gal system) with stable Alk, Cal, and Mag. dosing. ICP tests are spot except low iodine, and strontium.

I was wondering if there have been any improvements, or stability requirements that you have achieved. my LPS tissue recedes and polyps bail ;/ I have only been able to successfully keep about half of the LPS corals i put in. SPS frags also die within a week.