The All-Around Professional Formula
Not every koi keeper is chasing maximum growth or prepping fish for a show. Most of us just want healthy, vibrant, long-lived fish that look great in the pond year-round. That's exactly what Blackwater Gold-N Professional was designed to deliver — a premium, well-rounded formula that covers all the nutritional bases without the specialization of a growth or color-specific food.
Gold-N Professional is the formula we recommend most often to hobbyists who want a single high-quality food they can feed with confidence across a wide range of fish, pond sizes, and seasons.
What Sets Gold-N Professional Apart
The "Professional" in the name isn't marketing — it reflects the quality of ingredients and the precision of the formulation. Gold-N Professional uses a higher grade of fish meal than most mid-tier koi foods, resulting in better digestibility, less waste, and cleaner water. The protein-to-fat ratio is optimized for maintenance and moderate growth rather than maximum output, making it suitable for adult fish as well as younger fish that don't need the intensity of Max Growth.
The formula includes:
- High-quality fish meal and shrimp meal for a complete amino acid profile
- Stabilized vitamin C to support immune function and reduce susceptibility to common bacterial infections
- Natural color enhancers (spirulina and carotenoids) to maintain baseline color without the concentration of a dedicated color food
- Probiotics to support digestive health and improve nutrient absorption
Who It's For
Gold-N Professional is an excellent choice for:
- Hobbyists who want a single premium staple food without managing multiple formulas
- Ponds with a mix of fish at different life stages
- Keepers transitioning away from big-box store foods who want a meaningful quality upgrade
- Goldfish keepers — the formula is equally well-suited for koi and goldfish
Feeding Recommendations
Feed 2–3 times daily during active feeding season (water temps above 55°F), offering only what your fish consume in 3–5 minutes. Gold-N Professional can be fed as a standalone staple or paired with Blackwater Color Enhancing for keepers who want to give color development an extra boost without committing to a full color-focused program.
As water temperatures drop below 60°F, transition to Blackwater Cool Season formula to match your fish's slowing metabolism.
Available at Crystal Creek Koi Farm
We carry Blackwater Gold-N Professional in 2 lb bags, and it's available as part of our Koi Food Subscription — subscribe and save 15% on every bag delivered automatically.
Looking to compare formulas or build a complete feeding program? Browse our full Blackwater lineup and find the right fit for your pond.
Shop Blackwater Koi Food
Ready to give your koi premium nutrition year-round? Shop the full Blackwater lineup below.
- Blackwater Gold-N Professional — 2 lb Bag — Premium well-rounded daily nutrition
- Blackwater Ultimate Combo Diet — 2 lb Bag — The everyday staple foundation food
- Blackwater Color Enhancing — 2 lb Bag — Intensify reds, oranges, and yellows
- Blackwater Max Growth — 2 lb Bag — Fuel rapid size development in peak season
- Blackwater Cool Season — 2 lb Bag — Wheat germ formula for fall and winter feeding