Macronutrients formula

[Biulu]

I will be running out of potassium nitrate anytime soon and since it is very hard to get this separately nowadays, I am looking to buy dry ferts in a mix. In the hydroponic stores I have the following formula options:
20-20-20
10-52-10
20-5-30
30-10-10
and 14-5-38

What is my best choice?

It is a medium light set-up with T5's and NO CO2.

Thanks in advance!

[wolfiewill]

I will be running out of potassium nitrate anytime soon and since it is very hard to get this separately nowadays.... What is my best choice?

I have 50 kilos of KNO3, and have been selling it at cost for about a year now. PM me and we'll get you some. KNO3 is $2 per 500 gms; KH2PO4 is $3 per 500 gm. And this is hydroponics grade.

[Biulu]

Perfect! Thanks. I will send you a PM.