Designed for your koi
Japanese nutrition,
and the water to match.
Nijikawa pairs premium, EWOS-science Japanese koi food with the Niji-no-Taki drum & bakki shower filtration system — everything your koi eat, and the clean, living water they thrive in.
Premium Japanese koi food
Four purpose-built formulas — high-protein growth, all-season maintenance, color enhancement, and a high-performance sinking diet for serious koi keepers.
Compare the formulas
Guaranteed analysis and feeding profile for every Nijikawa diet.
| Formula | Type | Protein | Fat | Pellet | Best for | From |
|---|---|---|---|---|---|---|
| Growth | Floating | 45% | 10% | 5mm · 7mm | Fast, healthy growth | $110 |
| Four Seasons | Floating | 35% | 8% | 5mm | All-season staple | $90 |
| Color Genesis | Float & Sink | 39% | 9% | 5mm · 7mm | Color enhancement | $155 |
| Professional | Sinking | 43% | 12% | 5mm · 7mm | High performance / shows | $190 |
Prices are minimum retail; multiple bag and bucket sizes available on each product page.
Living water, by Nijikawa
An innovative all-in-one filtration system that brings clean, living water to your pond — mechanical, biological and UV in a single stainless unit.
One system. Drum + bakki shower + UV.
Pond water is pumped in, passes through a 75-micron rotary drum screen, under the UV, then trickles down through stacked ceramic bakki media before returning crystal-clear over a quiet spillway. Mechanical, biological and sterilization filtration — integrated, efficient and built to last.
- Up to 10,000 GPH · ~6,000-gal ponds
- 40"L × 24"W × 68"H footprint
- Stainless-steel construction
- 75-micron rotary drum screen
- Timer wash cycle — no sensors to fail
- Built-in UV in stainless chamber
- Ceramic bakki media (high surface area)
- Under 5 amps · <½ gal per clean cycle
Niji-no-Taki — RDF + Bakki Shower
Media: with full load or without
Bakki Shower (No Drum)
Media: with full load or without
Ceramic Bakki Media
Parts & Components
Designed for your koi
Nijikawa — "rainbow river" — is premium Japanese koi nutrition built on EWOS feed science: an optimal essential-amino-acid profile, balanced protein-to-fat ratios, prebiotics, nucleotides, stabilized vitamins C, E and B12, and Expanded Pellet Technology for clean, complete digestion. Non-GMO, with a full vitamin and mineral mix.
With Niji-no-Taki, Nijikawa extends that same engineering to the water itself — so the food your koi eat and the pond they live in work together. Mystic Koi is an authorized Nijikawa dealer for both the food and the filtration, with sales and service support.
