With the 2HR Aquarist APT-EI, the famous nutrient dosing approach pioneered by Tom Barr is now available in a ready-to-use concentrate that removes the guesswork from trying to recreate this powerful and sometimes elusive formula.
An overview of the EI methodology can be found here.
Dose 5ml per 100L 3 times per week or 2ml per 100L daily. FAQ here.
Our signature Standard Pack comes with a calibrated pump. 300ml. Lasts ~3mths for a 40 Gal / 150L tank.
