Where to purchase ferts?

[Trivr]

Sorry for what I think is probably a very simple question, but I couldn't find the answer here, so can anyone make recommendation where to purchase KNO3 and KH2PO4? And is it available in different forms?

Thanks

Trivr

 

[nickmcmechan]

this website shows you where to buy ferts depending on where you live - US, Canada or UK?

James' Planted Tank - Estimative Index Explained

 

[Trivr]

Just placed my order and can't wait for it to arrive.

Thanks!