Mitsuru Aquarium Test K – water test strips

The Yokuchi Mitsuru Aquarium Test K is a drop-based kit for measuring potassium in aquarium water. It is aimed at planted tank keepers who dose macronutrients and want to check their fertilization against measured values rather than guesswork.

Why it matters

• Potassium-specific measurement: the kit targets K alone, so the result reflects this one macronutrient and can be tracked over time.
• Built for the GEN method: potassium is a key parameter in Growthive Excellent Nutrition, where the balance between nitrogen and potassium is the controlling factor.
• Paired reading with NO3: the K result is meant to be interpreted together with the NO3 result, because the ratio between the two shows whether macronutrient dosing is balanced.
• Complete set: each kit includes reagents and the accessories needed for the test, such as measuring containers, syringes, test tubes, measuring spoons, comparison scale and instructions.

Specifications

• Brand: YOKUCHI
• Model: Mitsuru Aquarium Test K
• Symbol: YOKUCHI MITSURU K
• EAN: 5903137563071
• Test type: drop test (potassium, K)

What it works with

The kit belongs to the aquarium water testing range and is used in freshwater planted aquariums where potassium is dosed as part of a fertilization routine. Because the result is interpreted alongside NO3, it fits keepers who test both parameters regularly and adjust their macronutrient dosing based on the NO3 to K relationship.