DIY Trace liquid: need help on formula

[aquadise]

Hello Randy,

I am digging the forums to seek formula to DIY trace liquid.
I try my best, but still cannot find formulas for following traces. I need help on formula.

1. Nickel.
I can buy NiCL2.6H2O powdered.

2. Selenium.
I can buy Na2SeO3 powdered
I also hope you could share formula for selenomethionine as well.

3. Chromium.
I can buy CrCL3.6H2O powdered

4. Iron.
For this, I have a raw material with brand name Ferrazone. It is Iron Sodium EDTA, with around 13% iron content. Is it ok to use in reef? If yes, I hope you could share the formula.

I also have Ferrous gluconate as well. I also cannot found the DIY formula that include Ferrous Gluconate.

One more question, I also have pure Manganese gluconate and Copper gluconate. Is it fine to use?

I already understand the risk that Selenium and Copper is hard to be confirmed via ICP OES.

Thank you in advance.

 

[Randy Holmes-Farley]

For ferrous gluconate, you can use my Fergon tablet recipe.

i don't have any specific formulas for the others, but the concentration you make it to may depend on the tank size you want to dose into (more dilute for a smaller tank so that the volume does is not too small).

 

[Randy Holmes-Farley]

NiCl2 x 6 H2O (mw = 238 g/mole) is 24.7% nickel by weight.

1 g NiCl2 x 6 H2O /L is 247 mg Ni/L = ppm.

If you dose 1 mL of that to 100 liters of aquarium volume, the boost is 0.0025 mg/L or 2.5 ppb.

 

[Randy Holmes-Farley]

Na2SeO3 (mw = 173 g/mole) is 45.7% selenium by weight.

1 g Na2SeO3 /L is 457 mg Se/L = ppm.

If you dose 1 mL of that to 100 liters of aquarium volume, the boost is 0.0046 mg/L or 4.6 ppb.

 

[Randy Holmes-Farley]

CrCL3.6H2O (mw = 266 g/mole) is 19.5% chromium by weight.

1 g CrCL3.6H2O /L is 19.5 mg Cr/L = ppm.

If you dose 1 mL of that to 100 liters of aquarium volume, the boost is 0.002 mg/L or 2.0 ppb.

 

[Randy Holmes-Farley]

Selenomethionine (mw = 196 g/mole) is 40.3% selenium by weight.

1 g Selenomethionine /L is 40.3 mg Se/L = ppm.

If you dose 1 mL of that to 100 liters of aquarium volume, the boost is 0.0040 mg/L or 4.0 ppb Se. [edited to be correct]

 

[Randy Holmes-Farley]

Manganese and copper gluconates should be fine.

 

[aquadise]

Wow that is super fast calculation!

Thank you so much, Randy. Deeply appreciated your help. ‍

 

[scoty254]

Selenomethionine (mw = 196 g/mole) is 40.3% selenium by weight.

1 g Selenomethionine /L is 40.3 mg Se/L = ppm.

If you dose 1 mL of that to 100 liters of aquarium volume, the boost is 0.0040 mg/L or 2.5 ppb Se.

correction here is needed.

0.0040 mg/l is correct but that’s 4.03 ppb Se not 2.5 ppb

 

[Randy Holmes-Farley]

correction here is needed.

0.0040 mg/l is correct but that’s 4.03 ppb Se not 2.5 ppb

Good catch, thanks, that is correct. :)

 

[scoty254]

Good catch, thanks, that is correct. :)

Randy is there any chance you could message me Directly ?
I’m trying to find selenium product I could use to diy prepare selenium dosing solution.
There is so many selenium varieties I have no idea ..
and selenium metionine is very very expensive

I’d be grateful if you could


Apart from selenium forms I have no idea about, there are these below .. any of these any good for reef dosing ?

1. Pure selenium ( Se ) powder
2. Na2SeO3
3. Na2O3Se
4. O=Se=O

 

[Randy Holmes-Farley]

Randy is there any chance you could message me Directly ?
I’m trying to find selenium product I could use to diy prepare selenium dosing solution.
There is so many selenium varieties I have no idea ..
and selenium metionine is very very expensive

I’d be grateful if you could


Apart from selenium forms I have no idea about, there are these below .. any of these any good for reef dosing ?

1. Pure selenium ( Se ) powder
2. Na2SeO3
3. Na2O3Se
4. O=Se=O

There are two selenium recipes linked in this thread:

DIY Chemistry Archive

I thought it would be useful to have an archive of DIY chemistry methods. I'll add to it as things come up. Calcium and Alkalinity DIY method comparison https://www.reef2reef.com/threads/randy-recommended-diy-two-part-recipes.984604/ Three Part using Sodium Hydroxide (including Balling Part...

www.reef2reef.com

 

[scoty254]

There are two selenium recipes linked in this thread:

DIY Chemistry Archive

I thought it would be useful to have an archive of DIY chemistry methods. I'll add to it as things come up. Calcium and Alkalinity DIY method comparison https://www.reef2reef.com/threads/randy-recommended-diy-two-part-recipes.984604/ Three Part using Sodium Hydroxide (including Balling Part...

www.reef2reef.com

Selenium metionine
Na2SeO3

From what I see there are those two above

Is Na2O3Se any different ? Could this be used as well ?

Also does it matter whether they are hydrated or not ?

 

[Randy Holmes-Farley]

Selenium metionine
Na2SeO3

From what I see there are those two above

Is Na2O3Se any different ? Could this be used as well ?

Also does it matter whether they are hydrated or not ?

I do not know which form is better to dose. Hydrated is not a concern. It just lowers the potency a small amount. I've never seen a study on selenium dosing chemicals to compare.

Na2O3Se is identical to Na2SeO3. The order of elements in a molecular formula like this does not indicate a chemical difference.

Oceamo has a write up here, which fortunately lacks the hype and distortion often present in company discussions about the use and importance of various ions.

Selenium | Oceamo

Useful information about the element selenium in aquarium water.

en.oceamo.com

 

[acro_lover]

Hi @Randy Holmes-Farley , do you know what does it mean " Bioreagent, suitable for cell culture" ? I am looking to buy Nickel(II) chloride hexahydrate and find it diffucult to chose the right grade? Do you think that one will be ok for aquarium use? Rest of the option are way more expensive.

 

[Randy Holmes-Farley]

Hi @Randy Holmes-Farley , do you know what does it mean " Bioreagent, suitable for cell culture" ? I am looking to buy Nickel(II) chloride hexahydrate and find it diffucult to chose the right grade? Do you think that one will be ok for aquarium use? Rest of the option are way more expensive.

I’m not sure exactly what specifications they use for that grade, but I expect that one and all of the others on that page are good for our use as a trace element supplement. We add very, very little, so any impurities are added in extremely low amounts, unlike impurity concerns in things added in higher amounts, such as calcium supplements.

 

[acro_lover]

@Randy Holmes-Farley , thanks a lot for your help and clarification. Happy Reefkeeping:)

 

[Randy Holmes-Farley]

@Randy Holmes-Farley , thanks a lot for your help and clarification. Happy Reefkeeping:)

You're welcome.

Happy reefing. :)

 

[acro_lover]

Hi @Randy Holmes-Farley , what would you say is best bottle for storing chemicals long term? borosilicate glass? would plastic bottles do the job? Any specific shape and opener? Thanks

 

[Randy Holmes-Farley]

Hi @Randy Holmes-Farley , what would you say is best bottle for storing chemicals long term? borosilicate glass? would plastic bottles do the job? Any specific shape and opener? Thanks

Depends on the chemical and what sorts of changes are a concern.

Glass keeps out CO2 better, breaks easier, and in a few cases, can release silicate.

Plastics vary, but all are more break resistant, some are mostly inert while others will be damaged by some chemicals, some can release ingredients put into them, and microplastic particles seem to be everywhere.

Overall, I’d pick glass unless the pH is very high, except perhaps a fluoride dosing solution. I’m not sure, but that might be best in polyethylene.