More than ten years of experience fish keepers tell you how to keep good koi

        The history of Koi breeding in China dates back to the Tang Dynasty, but today it is taking a more hands-on approach to urban balconies and courtyards. This guide has no obscure theories, but only practical experience accumulated from millions of water changes, feeding and disease treatment. What you will see is how to use scientific methods to avoid the regret of the "Three Days of Koi Grief", and how to find a balance between water quality monitors and natural bait.

       In particular, modern water recirculation systems and genetic screening technology have brought koi farming into a new era. 2025's latest research shows that the judicious use of Internet of Things (IoT) feeding devices can increase the efficiency of koi size development by up to 401 TP3 T. But remember: no amount of technology can replace the silent gaze you have with these elves as you bend over your pond every day.

      May this guide accompany you through every frazzled morning and worried night on your way to keeping carp. One day, when your favorite carp suddenly leaps out of the water and kisses your finger, you will know - all the efforts are worthwhile.

I. Fish pond construction: giving koi a five-star home

1. Three elements of site selection
   • Avoid deciduous areas (especially wary of poisonous species such as oaks)
   • Ensure more than 6 hours of light per day
   • Reserve 1 meter or more for access
2. Structural Design Golden Ratio
   • Recommended water depth 1.2-1.8 meters (up to 2 meters in the north to prevent freezing)
   • The pool bottom is sloped toward the drain with a 3% slope
   • Chamfered edges at 45° to prevent rubbing on the fish.

Practical tips: use waterproof canvas temporary water test, observe 72 hours to confirm leakage before doing formal waterproof layer.

Second, the filtration system: the core code of clear water and beautiful fish

Three-stage filtration system configuration program

Common Misconceptions Warning

• Flow rate pump selection: total volume of water x 5 times/hour (e.g., 10-ton pool requires 50-ton/hour pump)
• Prohibit the use of copper-containing fittings (koi are extremely sensitive to copper ions)

III. New fish in the pool: 21 days of life and death

1. five-step procedure for crossing the water
   (1) Equilibrate the temperature of the pool for 30 minutes with a bag of bubbles
   (2) Add 1/5 of the pool water every 10 minutes.
   (3) Lasting more than 2 hours
   (4) Separate quarantine pool observation for 7 days
   (5) Salt bath with 5% for 3 minutes prior to main pool placement
2. Stress management program
   When bottoming out and refusing to eat occurs:
   ➤ Maintain a constant water temperature of 28°C
   ➤ Add 0.31 TP3T crude salt
   ➤ Turning off the bright lights

IV. Daily management: details determine success or failure

Four-season management calendar

• Spring: start feeding above 15℃, starting at 1% of body weight
• Summer: morning and evening feeding to avoid midday, weekly water change 1/4
• Autumn: gradual switch to low-protein feeds in preparation for overwintering
• Winter: stop eating below 10°C, icebreaker to maintain breathing holes

Stock list of medicines✓ Chlorine dioxide (routine disinfection) ✓ Povidone-iodine (trauma management) ✓ Metronidazole (internal parasitic treatment) ✓ Vitamin C tablets (stress recovery)

V. Lessons in blood and tears: don't make these mistakes!

• Failure to check the drainage system before the rainy season → Koi jumping out of the pond en masse after heavy rains
• Mixed scavenger → nighttime sucking of koi body surface mucous membrane
• Overfeeding→Enteritis death rate exceeds 60%
• Add new fish randomly → bring in virus to wipe out the whole army

       "Carp farming is a practice, and there is a price to be paid for haste."

        Every koi swimming is a poem written by water. They refract the sunlight with their scales and measure time with their tail fins, and you only need three keys: a good pool of water, patience, and a good method.