JUN Master Soil – Black Super Powder (3L/8L)

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.
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)
Japanese aquarium soil , shrimp soil, soil substrate, aquarium substrate, plant soil, aquarium plant soil

Using JUN Master Soil Black Super Powder in Singapore tanks

The Super Powder grade is the finest version JUN makes, with grains small enough to anchor delicate carpet plants and dwarf hairgrass without burying the runners. We see hobbyists here reach for it specifically for nano scapes and foreground detail work, often capping a coarser normal-grade base layer with a thin Super Powder top so fine roots get a soft bed while the deeper layer stays porous and oxygenated. The 3L bag suits a 30-45cm tank; 8L covers a 60cm footprint comfortably.

As an active soil it buffers pH, GH and KH downward, which is genuinely useful given Singapore’s tap water sits soft and slightly acidic already. That makes it well suited to crystal and Caridina shrimp, which need stable soft-acidic conditions. Expect an ammonia spike in the first weeks as the soil leaches nutrients, so cycle fully before adding livestock and run extra water changes early. Being a powder, it clouds easily, so flood the tank slowly over a plate or bag.

Explore our wider substrate range, and read our active vs inert substrate guide and aquasoil lifespan guide to plan ahead.