Tosai RG92 (3mm Pellet)

Refined nutrition for the healthy, harmonious development of tosai.

KiGen Tosai RG92 Premium Koi Food is a high-quality growth food developed specifically for young koi from approximately 12cm upwards. Designed to support intensive but controlled development, Tosai RG92 helps promote rapid harmonious growth, strong skeletal structure, refined skin quality and balanced body shape.

This premium formula is ideal for koi keepers who want to develop young koi correctly from an early stage, supporting not just size, but proportion, health and long-term quality.

Key Benefits

• Supports healthy development of young koi
• Encourages rapid but balanced growth
• Helps develop strong skeletal structure
• Supports refined skin quality and lustre
• Includes colour support for beni/red and shiroji/white
• Designed for serious hobbyists and grow-on systems

Why Choose KiGen Tosai RG92?

Young koi have different nutritional demands to mature koi. KiGen Tosai RG92 has been formulated with elevated protein and mineral levels, combined with a carefully balanced protein-to-fat ratio, to support the growth phase without placing unnecessary strain on metabolism or filtration.

Functional ingredients including antioxidants, active clay and natural herbal oils help support vitality, digestion and immune function, while spirulina and astaxanthin support natural colour development.

Product Details

• Pellet Type: Floating
• Pellet Size: 3mm
• Available Sizes: 1.2kg and 5kg
• Protein 38%
• Best For: Tosai and young growing koi
• Feeding Season: Best used during active feeding and grow-on periods

Feeding Advice

Feed according to water temperature, oxygen levels, filtration capacity and fish activity. KiGen recommends conservative feeding rates, with feeding reduced immediately if ammonia or nitrite levels rise

Feeding recommendation Tosai koi feed
This information is intended for young and growing koi fed with
the highly digestible Tosai diet.
Temperature-dependent feeding table
Water Daily feeding ratio

Temperature (% body weight)
< 8°C 0% Do not feed
8–10°C 0.05–0.10% Limited digestion
10–12°C 0.10–0.15% Transition phase
12–14°C 0.15–0.20% Slow digestion
14–16°C 0.20–0.25% Still conservative
16–18°C 0.25–0.30% Upper limit below 18°C
18–20°C 0.30–0.60% Improved utilization
20–22°C 0.60–1.00% Increasing efficiency
22–24°C 1.00–1.40% Approaching optimum
24–26°C 1.40–1.80% Physiological optimum
26–28°C 1.10–1.40% Declining utilization
> 28°C < 1.00% Reduce feeding
A daily feeding ratio of 0.3 % of body weight is first exceeded at 18°C.
Tosai feeding should always be adjusted to water quality and oxygen
availability. If ammonia or nitrite increase, reduce feeding immediately.