Iodide source question

[lavoisier]

I've just spent a couple of hours reading Randy's articles on iodine (always a pleasure) and several of the threads on the subject. My first Triton ICP-OES results (8/8/19) came back with I at 90 µg/l. My second result came back (10/25/19) at 0 µg/l. Given the fact that there is no evidence that Iodine dosing is necessary, I am still uncomfortable with my detectable levels from Triton test at 0. I would like to dose for a month at Triton's recommended level, observe the tank, and retest. Then I will stop for a month, observe the tank, and retest.

I have several questions I am hoping you all can help me with.

Triton: "We recommend the corrective dosage be carried out over 2 days. For the first 1 days the daily dosage should be 37.86ml. On the last day please use 7.58ml."

How would Kent Iodine supplement compare to Triton's? Could I use the same amount for dosing purposes?

Would I be better off attaining "Potassium Iodide, High Purity USP Crystals, 99.8 % min., 100 grams" ($20)? If so at what concentration should I mix in distilled water?

Many thanks for your wisdom to come. ;Bookworm

 

[Randy Holmes-Farley Verified Community Expert]

I would not assume Kent concentration is the same as Triton. If you get the diy (good plan, IMO), you can make it any concentration. Then you just need to determine how much will bring your tank to 0.06 ppm iodide.

 

[lavoisier]

I'll go the DIY route. Are there calculators somewhere I could use to get the concentration, then the "how much?" I haven't used my algebra skills for decades!

 

[RCeiver]

Might also want to look at Red Sea trace colors. You dose that based on your CA consumption so calculations are pretty simple.

IMO, iodine disappears within a very short time. The only time I haven’t had an ICP test come back with very low levels like yours is if I pull the sample less than an hour after dosing it.

 

[Randy Holmes-Farley Verified Community Expert]

Might also want to look at Red Sea trace colors. You dose that based on your CA consumption so calculations are pretty simple.

IMO, iodine disappears within a very short time. The only time I haven’t had an ICP test come back with very low levels like yours is if I pull the sample less than an hour after dosing it.

That method makes no sense to me. Iodine is mostly used by algae. Not sure how calcium consumption predicts iodine consumption.

 

[Randy Holmes-Farley Verified Community Expert]

I'll go the DIY route. Are there calculators somewhere I could use to get the concentration, then the "how much?" I haven't used my algebra skills for decades!

Pure potassium iodide is about 76.5% iodide.

One gram of it then contains 765 mg of iodine as iodide.

Dissolve that in 100 ml of water, and it contains 765 mg/100 mL = 7.7 mg/mL

If you have 100 Liters of tank water and want to boost it to the natural level of 0.06 ppm (mg/L) iodine, then you need 0.06 mg/L x 100 L = 6 mg.

Thus, dosing 6/7.7 = 0.78 mL of that stock solution adds 6 mg and brings the tank to 0.06 mg/L.

 

[anth]

Pure potassium iodide is about 76.5% iodide.

One gram of it then contains 765 mg of iodine as iodide.

Dissolve that in 100 ml of water, and it contains 765 mg/100 mL = 7.7 mg/mL

If you have 100 Liters of tank water and want to boost it to the natural level of 0.06 ppm (mg/L) iodine, then you need 0.06 mg/L x 100 L = 6 mg.

Thus, dosing 6/7.7 = 0.78 mL of that stock solution adds 6 mg and brings the tank to 0.06 mg/L.

Hi Randy
Am i right in thinking
1gram mixed with 100ml of water for stock soulution
4.29ml of this solution will raise 550L of water from zero too 0.06ppm

thanks
Anth