2Hr Aquarist APT e Estimative Index 300ml

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.

Dose 5ml per 100L 3 times per week or 2ml per 100L daily.
FAQ here.

Our Standard 300ml Pack comes with a calibrated pump.
Lasts ~3mths for a 40 Gal / 150L tank.

APT e / ESTIMATIVE INDEX provides an easy approach to practice Tom Barr's famous fertilisation regime, with adjustments based on our proprietary Capstone Formula. Use it for the quintessential EI experience of peerless growth speed through unlimited nutrition- but make sure that you are equally disciplined in plant husbandry and maintenance.

APT E / Estimative Index
Liquid inorganic macronutrient fertiliser
NPK (Mg) fertiliser with micronutrients and trace amounts of Boron (B), Copper(Cu), Manganese (Mn), Molybdenum (Mo) and Zinc (Zn).
1.6-1.7-8.5 (+1.6)

1.6% Total Nitrogen (N)
- 1.6% nitric nitrogen
1.7% Total Phosphorus pentoxide (P2O5)
8.5% Total Potassium oxide (K2O)
1.6% Magnesium oxide (MgO)
0.18% Total Iron chelated by EDTA, DTPA and EDDHA.
All nutrients are completely water soluble.

Ingredients:
Potassium sulphate (CMC1 CAS n°7778-80-5) Potassium chloride (CMC1 CAS n°7447-40-7) Magnesium nitrate (CMC1 CAS n°10377-60-3) Magnesium sulphate (CMC1 CAS n°7487-88-9) Potassium phosphate (CMC1 CAS n°7778-77-0)