ADA Aqua Soil Amazonia Ver 2 (3L) Review (2026)

Who this substrate fits

This 3L bag is sized for nano and small aquascapes, roughly covering about five gallons of substrate depth by the general rule of thumb ADA and retailers cite, which makes it a better match for smaller tanks than buying a larger 9L bag and having soil left over to potentially go stale before the next scape. Aquascapers building a nature-style layout around soft water plants, or anyone keeping fish and shrimp that prefer soft, slightly acidic water, are the core audience, since the soil actively works on water chemistry rather than sitting inert like sand or gravel. It is less suited to keepers who want a neutral pH or harder water, or those on a tight budget where a larger, better value bag makes more sense.

Material and how it conditions water

According to ADA, Amazonia Ver 2 is made from natural Japanese black soil processed into granules with an irregular size and shape, designed to visually resemble a natural riverbed rather than a uniform manufactured substrate. The soil is formulated to lower water hardness and bring pH down toward a range suited to most aquatic plants, a property that comes from the soil chemistry itself rather than any added chemical buffer. Colloid particles in the soil help capture floating debris and clear the water without chemical treatment, and the granules are built to hold their shape and maintain air pockets underwater, supporting oxygen flow through the substrate bed for root development.

What is included and getting started

The 3L bag comes with a separate bag of Amazonia concentrate supplement, letting keepers dose it into the substrate layer during setup based on how nutrient-rich they want the base to be. Because Amazonia soil leaches ammonia during its first weeks underwater as the organic material breaks down, a proper fishless cycle is important before adding livestock, and this initial leaching period is a well-documented characteristic of ADA's Amazonia line rather than a flaw specific to this bag size. Keepers new to active soils should budget extra time for this settling and cycling phase compared with inert substrates.

How it compares with other ADA Aqua Soil options

Within ADA's own lineup, the 9L version of Amazonia Ver 2 scores slightly higher mainly on value per liter for larger tanks, while New Amazonia and the Amazonia II Normal Type sit close in score with broadly similar water-softening behavior. The Powder Type variant in the same 3L size uses a finer grain aimed at carpet plants and detailed foreground work rather than general planting, making it a complementary product rather than a direct substitute. Across the range, the core soil chemistry and Amazon riverbed aesthetic stay consistent; the differences are mostly about grain size and bag volume rather than a fundamentally different formula.

Verdict and who should pick something else

This is a strong pick for nano and small aquascapes that want ADA's proven water-softening active soil without committing to a larger bag that may sit half used. The included concentrate supplement adds value for keepers who want a nutrient-rich base layer from day one. Expect a higher per-liter cost than the 9L bag and plan for an initial ammonia-leaching cycle before stocking. Keepers with larger tanks should buy the 9L size for better value, and anyone wanting neutral, harder water conditions should choose an inert substrate instead of an active soil like this one.

Frequently asked questions