APT E/Estimative Index Fertilizer – 2Hr Aquarist (1000ml Refill)
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Advanced Planted Tank E/Estimative Index by 2Hr Aquarist (1000ml 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.
300ml. Lasts ~3mths for a 40 Gal / 150L tank.
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