Sodium Hydroxide concentration

[Commstech]

Hi team

I currently dose Triton Core7 which I like. My tank ph is lower than i'd like though. It sits between 7.9 and 8.1 if I use a Co2 scrubber. lower if not. I have been thinking of swapping out the Alkalinity part of the triton for sodium hydroxide.

I would like to mix it up to be the same concentration as the Triton Alk for easy dosing with the other Triton salts. The triton Alk part is 19500dkh per litre. My question is how much sodium Hydroxide do I need to mix up the same Dkh per litre concentration.

Chemistry is not my strong point. Based on Randys recipe 2.0 I came up with these figures. Randy or anyone else. Can you please check them for me?

1 gram sodium hydroxide will raise 1L water to 70.8dkh or 1892meq/l

so 274.5 grams will raise 1L water to 19500dkh

Cheers

Jesse

 

[Commstech]

Is anyone able to confirm my
Calculation are correct for me? I’m not too confident in them.
Randy?

 

[Randy Holmes-Farley]

gram sodium hydroxide will raise 1L water to 70.8dkh or 1892meq/l

so 274.5 grams will raise 1L water to 19500dkh

Yes.

Sodium hydroxide has a molecular weight of 40 g/mole.

Thus, 1 g = 1/40 moles = 0.025 moles = 25 millimoles

1 g dissolved in 1L gives a concentration of 25 mM = 25 meq/L = 70 dKH

274.5 grams gives values 274.5 times higher, or 19,250 dKH

 

[Miami Reef]

Yes.

Sodium hydroxide has a molecular weight of 40 g/mole.

Thus, 1 g = 1/40 moles = 0.025 moles = 25 millimoles

1 g dissolved in 1L gives a concentration of 25 mM = 25 meq/L = 70 dKH

274.5 grams gives values 274.5 times higher, or 19,250 dKH

Doesn’t OP want 19,500dKH/L (not 19,250dKH/L)?

Wouldn‘t he need 278.5g to get to his desired concentration?

 

[Commstech]

Yes.

Sodium hydroxide has a molecular weight of 40 g/mole.

Thus, 1 g = 1/40 moles = 0.025 moles = 25 millimoles

1 g dissolved in 1L gives a concentration of 25 mM = 25 meq/L = 70 dKH

274.5 grams gives values 274.5 times higher, or 19,250 dKH

Thankyou Randy for breaking that down for me. makes it easier to understand

 

[Commstech]

Doesn’t OP want 19,500dKH/L (not 19,250dKH/L)?

Wouldn‘t he need 278.5g to get to his desired concentration?

Yep I'm after 19500dkh, So I'll add 278.5 grams

Cheers for the help

 

[Randy Holmes-Farley]

Doesn’t OP want 19,500dKH/L (not 19,250dKH/L)?

Wouldn‘t he need 278.5g to get to his desired concentration?

I was just calculating for the mass he gave.

 

[Commstech]

Hi Randy, I got my new batch of Triton today and my sodium hydroxide ready to mix up.

I'm a little confused though. According to our calculations I would need 278.5 grams of sodium hydroxide per litre to make 19500dkh.

So that means for my 8 litre solution I need 2228 grams to make 19500dkh per litre.

But when I weigh the triton Alkalinity powder on the scales its only 1800grams of powder. I assume its sodium Bicarbonate or carbonate.

I thought the sodium hydroxide was stronger per gram than Bicarbonate or carbonate. so shouldn't the Triton powder weigh a far bit more? Or am I way off here?

Cheers

Jesse

 

[Randy Holmes-Farley]

Hi Randy, I got my new batch of Triton today and my sodium hydroxide ready to mix up.

I'm a little confused though. According to our calculations I would need 278.5 grams of sodium hydroxide per litre to make 19500dkh.

So that means for my 8 litre solution I need 2228 grams to make 19500dkh per litre.

But when I weigh the triton Alkalinity powder on the scales its only 1800grams of powder. I assume its sodium Bicarbonate or carbonate.

I thought the sodium hydroxide was stronger per gram than Bicarbonate or carbonate. so shouldn't the Triton powder weigh a far bit more? Or am I way off here?

Cheers

Jesse

Equal alk potency (1 eq/l = 2800 dKH):

Sodium hydroxide 40 g/L
sodium bicarbonate 84 g/L
sodium carbonate 53 g/L

Where did you get the triton potency info from?

 

[Commstech]

Equal alk potency (1 eq/l = 2800 dKH):

Sodium hydroxide 40 g/L
sodium bicarbonate 84 g/L
sodium carbonate 53 g/L

Where did you get the triton potency info from?

I asked Ehsan on facebook and he replied with 19500dkh concentration. There is also a few other places that list that concentration with a quick google. Here is a facebook post from Triton.

When he replied he said "there is 19500dkh in all four 1L solutions. So 3A and 3B are Alk and they contain 19500 dkh per litre"

maybe I have misread what he is trying to say?

 

[Randy Holmes-Farley]

What is written is not technically correct from a unit of measure standpoint. Tropic Marin does the same thing. Maybe it is a translation issue for both, but the dKH of 1 mL and one million liters of the same fluid is identical. It has a per volume part already built into it. 19,500 dKH us a meaningful statement, while 19,500 dKH per L is not.

Thus I think his statement is unclear in intent. Is it for 1 L, 4 L, or 2 L?

Also, now that I look at it, it seems too high to just be dKH. My diy recipe 1 is 5,300 dKH, and I doubt the concentration of that material is three time higher. I think it would hit the solubility limit.

 

[Commstech]

I asked Ehsan on facebook and he replied with 19500dkh concentration. There is also a few other places that list that concentration with a quick google. Here is a facebook post from Triton.

When he replied he said "there is 19500dkh in all four 1L solutions. So 3A and 3B are Alk and they contain 19500 dkh per litre"

maybe I have misread what he is trying to say?

I just tested the triton solution, and it looks like its roughly 10200dkh. I just used my salifert test kit and diluted it by 1000x

 

[Commstech]

What is written is not technically correct from a unit of measure standpoint. Tropic Marin does the same thing. Maybe it is a translation issue for both, but the dKH of 1 mL and one million liters of the same fluid is identical. It has a per volume part already built into it. 19,500 dKH us a meaningful statement, while 19,500 dKH per L is not.

Thus I think his statement is unclear in intent. Is it for 1 L, 4 L, or 2 L?

Also, now that I look at it, it seems too high to just be dKH. My diy recipe 1 is 5,300 dKH, and I doubt the concentration of that material is three time higher. I think it would hit the solubility limit.

I wonder if its actually half the strength he is saying then? so 9750dkh. Seeing as though my crude test was around 10000dkh.
There is a few different ways to mix the new triton flex method. One is 2x4 litre solutions for the alk. THe other is 1x8 litre solution for the alk. I See what you are saying though dkh is constant no matter what the amount of fluid is. Must be a translation thing.

 

[Commstech]

What is written is not technically correct from a unit of measure standpoint. Tropic Marin does the same thing. Maybe it is a translation issue for both, but the dKH of 1 mL and one million liters of the same fluid is identical. It has a per volume part already built into it. 19,500 dKH us a meaningful statement, while 19,500 dKH per L is not.

Thus I think his statement is unclear in intent. Is it for 1 L, 4 L, or 2 L?

Also, now that I look at it, it seems too high to just be dKH. My diy recipe 1 is 5,300 dKH, and I doubt the concentration of that material is three time higher. I think it would hit the solubility limit.

I might try mixing up 139.25 grams per litre of caustic and then test it against the triton mix.

 

[Commstech]

So I mixed up 139.25 grams of sodium hydroxide with 1L of RO water. And tested it against the triton and they tested exactly the same.

 

[Randy Holmes-Farley]

That sounds good, but I'd personally ignore the Triton potency and just move forward. Figuring it out doesn't really matter if you aren't going to use it. When you alter pH you will alter demand for alk and calcium anyway.

 

[Reefahholic]

This is what I understood when I ran it. Not sure if it changed since then.

Triton Core7:

Number 1 = Magnesium + Traces
Number 2 = Calcium + Traces
Number 3A = Alkalinity + Traces
Number 3B = Alkalinity + Traces

Reefahholic said:
So both bottles are equal with Alk? 9750 per bottle.
Julian@Triton said:
Correct. Components 3a and 3b both contain equal Alk (9750 dKH per bottle).

19,500 dKH or 6,964meq/L (Both 3A & 3B)
9,750 dKH or 3,482meq/L (3A only)
9,750 dKH or 3,482meq/L (3B only)

 

[Randy Holmes-Farley]

Thanks for the clarification.