2Hr Aquarist APT Estimative Index

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.

#200ml

200ml lasts ~3mths for a 30 Gal / 115L tank. Pump not included. 

#500ml

500ml lasts ~3mths for a 65 Gal / 150L tank. Pump not included.

#1000ml

1000ml lasts ~3mths for a 130 Gal / 500L tank. Pump not included.

#standard

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

Why

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.

Ingredients

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)