Most Affordable N,P,K Dosing

Hi all, so I've gone the whole 9 yards and invested in CO2 injection with 55w/l of light. I now need to dose npk I think? There aren't many plants in my 600l tank yet, so it's not critical yet I would imagine? The plants have been ordered though, so it will soon become essential when they start growing.

I'd appreciate any advice on the most economical way of dosing. If the most practical way is to buy branded products off the shelf, then the best bang for buck product is the one that I want. Any advice?

 

Oh... I forgot to mention that I'm making up some root tabs with potters clay and nutrifeed. Will stick a few of those into the pfp.

 

Estimative Index Dosing is by far the most affordable column dosing regime to follow.

http://www.apsa.co.za/xenforo/threads/ei-for-dummies.6142/

 

Thanks Daryl! That's just the info I was looking for.