Post your DIY additives here!

[Randy Holmes-Farley]

The words I wrote above are correct as written. Note the sentence says NaF, not just F-.

 

[Btloi89]

Be careful with fluoride. It can be fairly toxic.

NaF is 45% fluoride by weight, so to add 1 mg/L to 100 liters takes

(1 mg/L x 100 L ) / 0.45 = 222 mg, or 0.2 grams.

You can dissolve up to about 30 grams in a litter of RO/DI.

If you dissolve 10 grams in 1 L, then it is 10 mg/mL NaF and it takes 22 mL of that solution to boost 100 L by 1 mg/L F.

Randy, Here's the math I'm working with for 1250L system:

(1mg/L x 1250) / 0.45 = 2,777mg or 2.78grams

If I dissolve 10 grams per 1L RODI, what is the math to boost 0.11 mg/L in a 1250L system?

Appreciate it!

 

[KStatefan]

Randy, Here's the math I'm working with for 1250L system:

(1mg/L x 1250) / 0.45 = 2,777mg or 2.78grams

If I dissolve 10 grams per 1L RODI, what is the math to boost 0.11 mg/L in a 1250L system?

Appreciate it!

0.11 mg/L x 1250L = 137.5mg F 135.5 mg F /.45 = 305.5 mg NaF needed to contain 135.5 mg of F

0.3055 gram NaF/ 10 grams x 1000 ml = 30.55 ml of your solution needed to add 0.11 mg/L in 1250 L

 

[Btloi89]

0.11 mg/L x 1250L = 137.5mg F 135.5 mg F /.45 = 305.5 mg NaF needed to contain 135.5 mg of F

0.3055 gram NaF/ 10 grams x 1000 ml = 30.55 ml of your solution needed to add 0.11 mg/L in 1250 L

thank you

 

[Isaac Alves]

Use this calculator, pick the entry for potassium from potassium nitrate, and use 74% of the dosed amount (so 74 mL if it says 100 mL).

James' Planted Tank - Dosing Calculator

For my own curiosity:

• Why do we need to use 74% of the directed dose amount calculated?
• Why does the selection need to be ‘Potassium Nitrate’ for mixing up a solution of potassium chloride?
• What is the ideal way to store the resulting potassium chloride solution?

Thank you

 

[Randy Holmes-Farley]

For my own curiosity:

• Why do we need to use 74% of the directed dose amount calculated?
• Why does the selection need to be ‘Potassium Nitrate’ for mixing up a solution of potassium chloride?
• What is the ideal way to store the resulting potassium chloride solution?

Thank you

Both. answers are the same: there is no entry for potassium from potassium chloride, but doing the math I suggests allows use of a different calculator entry.

Potassium chloride lasts forever in any sort of container.

 

[Isaac Alves]

Be careful with fluoride. It can be fairly toxic.

NaF is 45% fluoride by weight, so to add 1 mg/L to 100 liters takes

(1 mg/L x 100 L ) / 0.45 = 222 mg, or 0.2 grams.

You can dissolve up to about 30 grams in a litter of RO/DI.

If you dissolve 10 grams in 1 L, then it is 10 mg/mL NaF and it takes 22 mL of that solution to boost 100 L by 1 mg/L F.

How long does NaF take to dissolve in 1L of RODI?

And I used a glass flask on a stirrer, could that cause issues with mix time?

 

[Randy Holmes-Farley]

I do not know how long it takes to dissolve NaF, but I would not have thought too long.

How much did you add? Did most dissolve?

If most dissolved and just a bit did not, that latter undissolved stuff may be impurities.

You used RO/DI, right, not tank water?

Glass should be OK.

 

[Isaac Alves]

I do not know how long it takes to dissolve NaF, but I would not have thought too long.

How much did you add? Did most dissolve?

If most dissolved and just a bit did not, that latter undissolved stuff may be impurities.

You used RO/DI, right, not tank water?

Glass should be OK.

10g in 1L of RODI. I think most dissolved but it was still a lot of particulates swirling around after an hour of stirring.

I used Sodium Fluoride, Powder, Laboratory Grade, 100 g sourced from Carolina supply company.

https://www.carolina.com/specialty-chemicals-s/sodium-fluoride-powder-laboratory-grade-100-g/889308.pr

 

[Randy Holmes-Farley]

Laboratory grade is not really anything in particular, so it may be impurities, such as calcium fluoride. I'd ignore it.

 

[Cuse89]

Be careful with fluoride. It can be fairly toxic.

NaF is 45% fluoride by weight, so to add 1 mg/L to 100 liters takes

(1 mg/L x 100 L ) / 0.45 = 222 mg, or 0.2 grams.

You can dissolve up to about 30 grams in a litter of RO/DI.

If you dissolve 10 grams in 1 L, then it is 10 mg/mL NaF and it takes 22 mL of that solution to boost 100 L by 1 mg/L F.

Be careful with fluoride. It can be fairly toxic.

NaF is 45% fluoride by weight, so to add 1 mg/L to 100 liters takes

(1 mg/L x 100 L ) / 0.45 = 222 mg, or 0.2 grams.

You can dissolve up to about 30 grams in a litter of RO/DI.

If you dissolve 10 grams in 1 L, then it is 10 mg/mL NaF and it takes 22 mL of that solution to boost 100 L by 1 mg/L F.

Reading through fluoride DIY posts I saw that Fluoride should not be stored in glass containers due to etching. Is there a specific container/storage that is a widely acceptable for fluoride then? TIA!

 

[Randy Holmes-Farley]

Reading through fluoride DIY posts I saw that Fluoride should not be stored in glass containers due to etching. Is there a specific container/storage that is a widely acceptable for fluoride then? TIA!

Polyethylene and polypropylene are good.

 

[Cuse89]

Polyethylene and polypropylene are good.

Thank you very much for the quick response! Just had one more thing, with your calculations above is there a manufacture that’s your go to for sourcing the product NaF?

https://www.sigmaaldrich.com/US/en/product/mm/106449?utm_source=google&utm_medium=cpc&utm_campaign=22099353999&utm_content=&gad_source=1&gbraid=0AAAAAD8kLQSAfBY0yq3mhdg5O6ShaHqjd&gclid=CjwKCAiAtsa9BhAKEiwAUZAszRK-GlQqJ5VSHygDU-Fc4GhlCfK2JSSTfsA9T53nJlHTx3pcnm0oMxoCDP0QAvD_BwE

Would this one work?
Sorry to bother just getting ready to order

 

[Randy Holmes-Farley]

Thank you very much for the quick response! Just had one more thing, with your calculations above is there a manufacture that’s your go to for sourcing the product NaF?

https://www.sigmaaldrich.com/US/en/product/mm/106449?utm_source=google&utm_medium=cpc&utm_campaign=22099353999&utm_content=&gad_source=1&gbraid=0AAAAAD8kLQSAfBY0yq3mhdg5O6ShaHqjd&gclid=CjwKCAiAtsa9BhAKEiwAUZAszRK-GlQqJ5VSHygDU-Fc4GhlCfK2JSSTfsA9T53nJlHTx3pcnm0oMxoCDP0QAvD_BwE

Would this one work?
Sorry to bother just getting ready to order

That one is certainly good. Loudwolf is used by some folks.

 

[KStatefan]

Thank you very much for the quick response! Just had one more thing, with your calculations above is there a manufacture that’s your go to for sourcing the product NaF?

https://www.sigmaaldrich.com/US/en/product/mm/106449?utm_source=google&utm_medium=cpc&utm_campaign=22099353999&utm_content=&gad_source=1&gbraid=0AAAAAD8kLQSAfBY0yq3mhdg5O6ShaHqjd&gclid=CjwKCAiAtsa9BhAKEiwAUZAszRK-GlQqJ5VSHygDU-Fc4GhlCfK2JSSTfsA9T53nJlHTx3pcnm0oMxoCDP0QAvD_BwE

Would this one work?
Sorry to bother just getting ready to order

Loudwolf is a less expensive option.