NaH2PO4 instead of KH2PO4?

[nazrm]

If yes, will I need to add K2SO4 to have enough K+?

 

[Hallen]

You're adding sodium aswell, so it's depends on your fish their tolerance for Na+. It's dependand on your KNo3 dose if you will need to add extra K, if you add enough you don't need any extra KS04. Some trace mixes have extra K added aswell, but in most cases that isn't alot.

But why use NaH2Po4? are you aware of an advantage i'm not?

 

[dutchy]

Na+ is more dangerous to fish and plants than K+. It may also raise your KH.

 

[nazrm]

Avaliability. Seems to be harder to come by KH2PO4 here. The company I'm buying from only has NaH2PO4. :/ And ordering from Norwegian suppliers is no go since they either can't be arsed to sell smaller amounts or they're so much more expensive than others. Or both! Going to place an order so I have dry ferts for atleast a year.

@dutchy: Well that settles it then, not getting NAH2PO4.

 

[Lost Csr]

Here is a link where you can get dry ferts
http://www.aquariumplantfood.co.uk/jj-s-ei-salts/23-potassium-nitrate-500g.html

check to see if they ship to your location

 

[nipat]

If yes, will I need to add K2SO4 to have enough K+?

Yes. The Na amount that comes with it when dosing EI is low.
If it's harmful level, no one would not use Fleet since it's same thing.

http://www.barrreport.com/showthread.php/7120-Disodium-hydrogen-phosphate-dosing

K+ is dosed as a part of GH Booster already... Well, but most people say
KNO3 alone provides enough K+. So I can't answer this question because
I supplement K2SO4 too, to dose same PPM of K+ and NO3.

 

[chopsticks]

PO4 dosage is pretty low, so may be not adding enough sodium to do any harm, but this is just my thinking/guessing, and I have almost no knowledge about this.

It may be quite different if you were going to add NaNO3, a lot more of potential harm.