APT E/Estimative Index Fertilizer – 2Hr Aquarist (500ml Refill)
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$37.99

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Advanced Planted Tank E/Estimative Index by 2Hr Aquarist (500ml Refill)

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.

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