For perfect aquarium plant growth: advanced water test series: resealable reagents for use with Proaquatest K, ideal for determining the optimal potassium value for fertiliser control Prevention of stagnant plant growth thanks to optimal potassium content, fertilisers such as JBL ferropol or JBL Proscape k macroelements increase the potassium content in case of negative values Box contents: 2 x JBL water test refills for JBL proaquatest k, contents: approx. 25 tests
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