Mixing trisodium phosphate anhydrous

[CK00020]

I have been looking for somewhere to start off with and haven’t found a recipe yet. I would like to make 2 liters of liquid and the product I have is

 

[CK00020]

I would like it to be maybe a little stronger than the neophos I currently dose

 

[gbroadbridge]

I would like it to be maybe a little stronger than the neophos I currently dose

Trisodium Phosphate dosing math

Trisodium Phosphate dosing math I haven’t seen much talk about phosphate dosing using Trisodium Phosphate. Say I want to make a solution so that I can raise my phosphates 0.01 PPM by adding 1ml solution in a 40 gallon tank. I’m using Na3PO4 99.9% https://www.ebay.com/itm/321926386899 I...

www.reef2reef.com

I normally make a solution that raises 100l of water by 0.1 ppm by dosing 1ml.

That is simply 1.5g in 100ml RODI

 

[CK00020]

So I put 1.5g in 500ml so yours is 5x as strong

 

[Courtney Aldrich]

How much solution do you want to add each time and how many ppm do ypu want to raise your phosphate per dose? Once you determine the volume and ppm increase I will tell you how much to add to prepare 2L.

 

[KStatefan]

Randy Holmes-Farley posted this in another thread

1. add 1.88g of the Trisodium Phosphate to 1 liter of water,
2. Adding 1 mL per 100 L of tank water will boost phosphate by 0.01 ppm

 

[CK00020]

Randy Holmes-Farley posted this in another thread

1. add 1.88g of the Trisodium Phosphate to 1 liter of water,
2. Adding 1 mL per 100 L of tank water will boost phosphate by 0.01 ppm

That is the recipe I used, I think it is fairly weak

 

[CK00020]

How much solution do you want to add each time and how many ppm do ypu want to raise your phosphate per dose? Once you determine the volume and ppm increase I will tell you how much to add to prepare 2L.

So tank and sump volume is 140 gal, I would like to raise .01 per ml and would like 1 liter of liquid.

 

[KStatefan]

I do not know if it is soluble at this rate but from the formula I posted above 9.964 gram per liter fro your 140 gallons (530 liters)

 

[Yoder]

I do not know if it is soluble at this rate but from the formula I posted above 9.964 gram per liter fro your 140 gallons (530 liters)

I just mixed a liter of this yesterday and those are the numbers I came up with as well. I dosed it, and came up right on the money.

 

[CK00020]

Thanks guys, what calculator are u using?

 

[KStatefan]

Thanks guys, what calculator are u using?

Just based on @Randy Holmes-Farley forumula, you wanted the same dosing amounts but your tank in 140 gallons or 530 liters which is 5.3 time bigger then the volume for 1.88 grams so multiply the 1.88 grams by 5.3 to get 9.964 grams.

 

[Randy Holmes-Farley Verified Community Expert]

Use this calculator and the entry for phosphate from potassium phosphate. It will be close enough since phosphate dosing is imprecise at best given that a substantial portion may bind to rock and sand.

James' Planted Tank - Dosing Calculator

 

[ScottB]

That is the recipe I used, I think it is fairly weak

I used it too, and it is fairly weak relative to other solutions like sodium nitrate. But that is okay really when you think about it. You are looking to reach a very different level of concentration in the tank in the end.

Once enough phosphate has been bound to your aragonite, your PO4 count will shoot up rapidly. I used about a liter into 300G to saturate the depleted rock. From there, I was barely dosing at all.