Backyard Aquaponics
A place to discuss aquaponics

damian how u kno that name of thst herb..?

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Potassium Sulphate, Sulphate will lower PH Sulphuric Acid.

I am using potassium bicarbonate. How much to add to a 8000 l tank with a 2800 l growbed? When k has to be 1.5 x N is that by weight? I don't get it

no it wouldn't.. it isnt the sulphate that lowers pH. it is the free H+ ions that disassociate for acids or acidic salts. mineral sulphur is different than sulfate. mineral sulphur reacts with OH radical with water to oxidize itself into sulfate. this process removes 'O' oxygen ions and leaves free H+ ion which interns lower the media pH.

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using the required potassium bicarbonate to raise K levels in water in a short time will drastically raise you water ph to a point that everything can die plants fish bacteria. that y normally we wait till the pH drops naturally to buffer the system with potassium or calcium. if u wana add in alot of potassium at once u have to do it using a neutral salt like KCl or potassium chloride or potassium phosphate K3PO4 or potassium sulfate K2SO4. I will really recommend using Potassium Phosphate because of it double benefits of addiction of phosphates at the same time especially needed for high production crops like tomatoes. from where I am potassium phosphate is hard to find so I have to make it myself using potassium hydroxide and phosphoric acid. I haven't go any problems with algae nowhere in my system. coming to the amount of K to use its varies between what type of K salt u input.


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this process removes 'O' oxygen ions and leaves free H+ ion which interns lower the media pH.
Thats what i said,Potassium Sulphate will lower your PH..

this process removes 'O' oxygen ions and leaves free H+ ion which interns lower the media pH.
Thats what i said.[/quote]

adding sulfate will not lower pH. adding sulphur will. there is a big difference

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Potassium Sulphate will lower your PH,potassium sulphate is best uses as a foliar feed.

look at the pH and see for yourself.

http://en.m.wikipedia.org/wiki/Potassium_sulfate

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Doesn’t Potassium sulphate when dissolved in water produce WEAK sulphuric acid ?

Which does show on your PH test.

sulphur dioxide or sulphur trioxide creates a weak acid or strong according to the amount.

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So Potassium Sulphate will NOT reduce PH ?

not it should not. the only reason it may reduce pH if there were remaining acid carried over into the product from the process. but K2SO4 is a neutral salt same as NaCl is neutral.

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I'll luv to teach u the chemistry behind it but its a bit long to discuss over de phonr

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