soution of iodine

Girish23 · Oct 13, 2016

i have 700 litter tank. i like to dose iodine in my tank.
what should i use for iodine solution for tank. and what is the minimum dose i dose weekly

Randy Holmes-Farley · Oct 13, 2016

I personally do not think it useful for most reefers to dose supplemental iodine, but when dosing, I recommend iodide (sodium iodide, potassium iodide, etc.).

Since it fairly rapidly depletes (taken up by algae), I'd recommend dosing up to the natural seawater level of about 0.06 ppm once or possibly twice a week (or the same amount spread over a week).

This has more:

Chemistry And The Aquarium: Iodine in Marine Aquaria: Part I ? Advanced Aquarist | Aquarist Magazine and Blog
http://www.advancedaquarist.com/issues/mar2003/chem.htm

Chemistry And The Aquarium: Iodine In Reef Tanks 2: Effects On Macroalgae Growth ? Advanced Aquarist | Aquarist Magazine and Blog
http://www.advancedaquarist.com/issues/april2003/chem.htm

Girish23 · Oct 13, 2016

Randy plz tell me the aprox dosing iodide amount for 185 gallon tank.

Randy Holmes-Farley · Oct 14, 2016

Girish23 said:
Randy plz tell me the aprox dosing iodide amount for 185 gallon tank.

Of what product?

Girish23 · Oct 14, 2016

potassium iodide

Randy Holmes-Farley · Oct 14, 2016

Potassium iodide is 76% iodine by weight.

If you dissolve 1 g in 100 mL of fresh water, that concentration is 0.76 g/100 mL = 7.6 mg/mL

If you want to dose 0.03 ppm iodide at once, then adding 1 mL of this fluid (7.6 mg) to 253 L (67 gallons) gives 7.6/253 = 0.03 ppm.

I'd start off dosing that once or twice a week and see what happens.

Cory · Oct 14, 2016

Randy Holmes-Farley said:
I personally do not think it useful for most reefers to dose supplemental iodine, but when dosing, I recommend iodide (sodium iodide, potassium iodide, etc.).

Since it fairly rapidly depletes (taken up by algae), I'd recommend dosing up to the natural seawater level of about 0.06 ppm once or possibly twice a week (or the same amount spread over a week).

This has more:

Chemistry And The Aquarium: Iodine in Marine Aquaria: Part I ? Advanced Aquarist | Aquarist Magazine and Blog
http://www.advancedaquarist.com/issues/mar2003/chem.htm

Chemistry And The Aquarium: Iodine In Reef Tanks 2: Effects On Macroalgae Growth ? Advanced Aquarist | Aquarist Magazine and Blog
http://www.advancedaquarist.com/issues/april2003/chem.htm

Im curious your reason for not dosing iodine? Ill guess it gets added in food to keep it from being limited? What if you dont do water changes?

Randy Holmes-Farley · Oct 14, 2016

Cory said:
Im curious your reason for not dosing iodine? Ill guess it gets added in food to keep it from being limited? What if you dont do water changes?

I'm just going on the fact that I dosed it for many years, then stopped and saw no difference, and I know quite a few experienced reefers who had the same experience. Was that because foods bring in enough? That's certainly possible.

There is also no demonstrated need for iodine in the scientific literature for most of the organisms we keep (with a few exceptions described in my article above). The big user is algae, and it is likely to be used mostly to make the algae unpalatable to herbivores, which is not typically useful or even desirable for us.

Cory · Oct 14, 2016

Randy Holmes-Farley said:
I'm just going on the fact that I dosed it for many years, then stopped and saw no difference, and I know quite a few experienced reefers who had the same experience. Was that because foods bring in enough? That's certainly possible.

There is also no demonstrated need for iodine in the scientific literature for most of the organisms we keep (with a few exceptions described in my article above). The big user is algae, and it is likely to be used mostly to make the algae unpalatable to herbivores, which is not typically useful or even desirable for us.

That's interesting. Id rather get 10 tangs and feed them nori than dose iodine. The nori should keep iodine from becoming limited no? Maybe even maganese.

Randy Holmes-Farley · Oct 14, 2016

Cory said:
That's interesting. Id rather get 10 tangs and feed them nori than dose iodine. The nori should keep iodine from becoming limited no? Maybe even maganese.

It will certainly provide iodine and trace elements to the tank.

Cory · Oct 14, 2016

Randy Holmes-Farley said:
It will certainly provide iodine and trace elements to the tank.

Sweet. How is it providing it? Is it the same mechanism of Phosphorus in fish when they eat it? Maybe some gets dissolved in the water even before consumption.

Do you think feeding nori could raise iodine levels too much?

Sorry for all the questions

Basically how is it entering the water theough food

Randy Holmes-Farley · Oct 14, 2016

Cory said:
Sweet. How is it providing it? Is it the same mechanism of Phosphorus in fish when they eat it? Maybe some gets dissolved in the water even before consumption.

Do you think feeding nori could raise iodine levels too much?

Sorry for all the questions

Basically how is it entering the water theough food

It is both inorganic iodide and organic forms when in an organism. Digestion releases both.

Girish23 · Oct 14, 2016

Randy Thx for reply and what about sodium iodide dosing for same size if tank

Girish23 · Oct 15, 2016

I m just confusing about this 1gallon water mix 100 ml potasium iodide is right or worng

Randy Holmes-Farley · Oct 16, 2016

Sodium iodide is fine.

I'm confused about what is confusing? lol

Girish23 · Oct 17, 2016

Randy plz tell me the aprox dosing sodium iodide amount for 185 gallon tank.?randy your tips and dosing discription so help full for me

Randy Holmes-Farley · Oct 17, 2016

Girish23 said:
Randy plz tell me the aprox dosing sodium iodide amount for 185 gallon tank.?randy your tips and dosing discription so help full for me

sodium iodide is 85% iodine by weight.

If you dissolve 1 g in 100 mL of fresh water, that concentration is 0.85 g/100 mL = 8.5 mg/mL

If you want to dose 0.03 ppm iodide at once, then adding 1 mL of this fluid (8.5 mg) to 253 L (67 gallons) gives 7.6/253 = 0.034 ppm.

So for 100 gallons, try 1.5 mL once a week.