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 2.5 ppb Se.

 

[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. ‍