Description
Master Soil is a Japanese active substrate intended for planted tanks. It has higher nitrogen and iron level than most standard soil, which will support intense planting.
JUN Master Soil – Brown Super Powder
High-grade soil that has further evolved aquatic plant breeding
Made from 100% domestic natural soil
Nutritional soil specialized for aquatic plant breeding, containing the nutrients necessary for aquatic plants.
In addition, the power of natural soil absorbs ammonia and nitrite, making it easy to create highly transparent and sparkling breeding water.
Why Master soil ?
water crystallizes very quickly, super clear water!
the substrate quickly removes the color of the wood resulting from the roots placed in the tank
lowers and stabilizes the pH, GH and KH parameters
porous structure ideal for the development of nitrifying bacteria
superior high nutrient content for aquatic plants. You will see the differences !
long service life of the substrate
Master Soil has more plant nutrients (mainly fulvic and humic acids as well as minerals) and naturally regulates the parameters of the water in the aquarium by lowering the value of the pH, GH and KH parameters.
Other than planting, Master Soil substrate can also be used for the breeding of ornamental shrimp and tropical fish. The active substrate Master Soil is manufactured in Japan using the latest technology of multi-stage surface sintering. As a result, the Master Soil substrate has excellent absorption properties, very high porosity, which prevents the formation of anaerobic zones and accelerates the colonization of Master Soil granules with large colonies of bacteria that quickly decompose “ammonia” (NH4 +) and nitrite (NO2). As a result, the time between water changes is significantly longer.
How much of master soil ?
45cm water tank (about 35L): 6-8L
60cm water tank (about 57L): 8-11L
90cm water tank (about 157L): 24-32L
Grain size: Super powder (1.0mm-2.0mm)
Color: Brown
Japanese aquarium soil , shrimp soil, soil substrate, aquarium substrate, plant soil, aquarium plant soil
JUN Master Soil Brown Super Powder for Fine Foregrounds
The brown super powder is the finest grade in the Master Soil line, made for delicate carpets and nano scapes where grain size visibly matters. The lighter brown tone reads softer in a tank than black soil and flatters bright green plants and reddish shrimp. As a Japanese active soil it conditions water toward the soft, slightly acidic side, which dovetails with the tap water most of us run in Singapore flats.
Because the grains are so small, lay a thin, even bed and let flow keep it oxygenated rather than piling it deep, where fine powder can compact and turn anaerobic. Like any active soil it releases ammonia early on, so cycle the tank fully before livestock and be patient with shrimp. Once the initial nutrient pulse eases, a steady column-dosing routine sustains the heavy planting this grade is built to support.
Compare grades across our substrate selection. Our shrimp substrate comparison and beginner planted tank mistakes guide will help you avoid early missteps.

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