low potassium

[Fishinwall]

I was told my salinity looked low however I had my refractometer calibrated and it was fine. 1.026

I couldn't understand it.

 

[Randy Holmes-Farley]

The salinity is not particularly low and is not why the potassium is low.

If you want to boost potassium,, I'd either use a commercial supplement, or something like this:

http://www.iherb.com/Now-Foods-Potassium-Chloride-Powder-8-oz-227-g/777

 

[Fishinwall]

The salinity is not particularly low and is not why the potassium is low.

If you want to boost potassium,, I'd either use a commercial supplement, or something like this:

http://www.iherb.com/Now-Foods-Potassium-Chloride-Powder-8-oz-227-g/777

I already bought it and have 10 g mix with a liter RODI. Just don't know how much to dose.

 

[Randy Holmes-Farley]

I already bought it and have 10 g mix with a liter RODI. Just don't know how much to dose.

If you have a scale, use this recipe (if not, we can estimate for you)

Potassium chloride is 52.3 % potassium by weight.

Add 10 grams into 1 L of fresh water. Ignore any nondissolving solids. This solution is 5230 ppm potassium.

Adding 1 mL per gallon tank water will boost potassium by 1.4 ppm.

 

[Fishinwall]

I have a scale and I already mixed it up... I just don't understand this part:

Adding 1 mL per gallon tank water will boost potassium by 1.4 ppm.[/QUOTE]


What do I need to dose daily and for how long to get my potassium back up?

 

[Greenstreet.1]

Think he means add 1ml per gallon and it will raise your potassium by 1.4ppm. So 1ml will add 1.4 ppm of potassium to a gallon of tank water that's what I get from it.

 

[Randy Holmes-Farley]

Figure out how many ppm you want to boost potassium.

Divide by 1.4 ppm.

Then take that number (now in mL) and multiply by the tank volume (in gallons) and dose that number of mL.

If it is more than 10 ppm potassium boost, I'd spread it out to 10 ppm per day.

 

[Fishinwall]

Figure out how many ppm you want to boost potassium.

Divide by 1.4 ppm.

Then take that number (now in mL) and multiply by the tank volume (in gallons) and dose that number of mL.

If it is more than 10 ppm potassium boost, I'd spread it out to 10 ppm per day.

I'm sorry this stuff is way over my head.
This is what I know.
I need to boost my tank by 211.16 (correction dose/ml).

I don't know how many ppm that is. Or is that already the number of ml I need to dose.?

 

[Randy Holmes-Farley]

Let's make sure what the 211.6 is.

If you took the ppm K you need, divided by 1.4, then multiplied by the tank volume in gallons, then you will dose 211 mL to the tank to make the boost you need.

 

[Fishinwall]

Let's make sure what the 211.6 is.

If you took the ppm K you need, divided by 1.4, then multiplied by the tank volume in gallons, then you will dose 211 mL to the tank to make the boost you need.

Randy the 211.6 is from my Triton test results. I've done no calculation yet.

 

[Randy Holmes-Farley]

Randy the 211.6 is from my Triton test results. I've done no calculation yet.

I don't understand. The potassium in your Triton test posted above is 342 ppm.
The usual target is 400 ppm.
You need a boost of 58 ppm.

What is the 211.6?

 

[Fishinwall]

I don't understand. The potassium in your Triton test posted above is 342 ppm.
The usual target is 400 ppm.
You need a boost of 58 ppm.

What is the 211.6?

You got me... It says "correction dosage". That's why I'm asking.

 

[Fishinwall]

See reply above. So do I take (58 / 1.4)X 75 then?
That gives me 3,107 ml to dose?

 

[Randy Holmes-Farley]

That presumably relates to one of their proprietary products. I'd ignore it entirely unless you are using a Triton product. If you are, then you need further directions from them.

 

[Fishinwall]

That presumably relates to one of their proprietary products. I'd ignore it entirely unless you are using a Triton product. If you are, then you need further directions from them.

No I'm not. I bought the potassium chloride you recommend and I miked 10g with 1 l. So how much do I dose?

 

[Randy Holmes-Farley]

Potassium chloride is 52.3 % potassium by weight.

Add 10 grams into 1 L of fresh water. Ignore any nondissolving solids. This solution is 5230 ppm potassium.

Adding 1 mL per gallon tank water will boost potassium by 1.4 ppm.

 

[Fishinwall]

Potassium chloride is 52.3 % potassium by weight.

Add 10 grams into 1 L of fresh water. Ignore any nondissolving solids. This solution is 5230 ppm potassium.

Adding 1 mL per gallon tank water will boost potassium by 1.4 ppm.

So again then I need 3,107 ml to get my tank up to 400, correct?

So what is the max dose per day I should dose? Is it 10 ml? If so I should dose 10 ml for 31 day?

 

[Randy Holmes-Farley]

Id' probably raise potassium 10 ppm per day until it gets where you want it.

Yes, to boost 75 gallons of water volume by 58 ppm, you'd dose 1 ml/gallon x 75 gallons x 58ppm/1.4 ppm = 3107 ml.

I'd spread that over a week.

 

[marke]

Randy
Is it advisable to use some Pot Sulfate with the chloride? If we wanted to how do we calculate the potas by wt? Ie you said the chloride has 52.3% p by wt. What would that be for p sulfate? The molar mass for P sulfate is 174.26. How do we do the math. Thanks in advance!

 

[Randy Holmes-Farley]

What is the purpose of the potassium sulfate? To add potassium? If so, it won't be that much and won't appreciably impact sulfate or chloride, so potassium chloride is also fine to use and is what I usually recommend since it is readily available.