Buying koi to avoid the pit guide: remember to pick fish "five look three not greedy".

First, look at the state: first stare at the fish tail and then look at the eye‌

‌1. Swimming test(Focus!)

• ‌healthy fishTail spreads naturally, cruises at an even pace, and turns nimbly with a tap on the tank wall.
• ‌fish that have been eliminated: retracted fins on the bottom, head down and upside down, frequent rubbing against the pool wall (possible parasites)

‌2. Mandatory details‌

• ‌fisheye: Clear and translucent without haze (haze = water poisoning)
• ‌gills of fish: Lift gill covers to see bright red without defects (whitish/ulcerated = gill disease)
• ‌rectum: Slight redness not prominent (redness = precursor to enteritis)

‌Second, look at the body type: head wide back thick tail shank thick‌

‌Good Fish Criteria"The longer you are, the more valuable you are.

• ‌head: Broad, full forehead, rounded, not upturned mouth
• ‌back (rear part of the torso): Smooth transition from dorsal fin to caudal peduncle without depression
• ‌tailstock: Thickness > 2cm (strong support, high disease resistance)

‌Lightning case: Last year, I bought a "big head doll" koi on the cheap, with a big head and a thin body, and it was the first to turn its belly over during the wintering.

‌Third, look at the scarlet quality: choose red as blood, abandon the orange like the setting sun‌

‌the science of colors(Red and white koi, for example)

• ‌purple silk floss: Positive red color with matte texture and sharp knife-like edges
• ‌secondary scarlet: Orange-red with yellowish light, easily fading to pinkish-white over time
• ‌deadly color: Black gill covers, red spots with white spots (stress/viral infection)

‌practical skill: Shooting straight with a cell phone flash against the tank, the pedigreed scarlet disk is impervious to light.

‌Fourth, look at the environment: the pool water is not as clear as the pool wall dirty‌

‌Selection of fish pond subterfuge‌

• ‌preferred: Green moss hanging on the bottom of the pool, sporadic foam floating on the surface of the water (mature nitrification system)
• ‌buy with caution: Super clear water + pool walls painted snow white (new water irritates fish and makes them susceptible to disease)
• ‌Run for it!: Pungent aroma wafting from fishponds (malachite green may have been used to disinfect)

‌Fifth, look at the after-sales: dead fish package to be written into the contract‌

‌lesson learned through blood and tears‌

• ‌the essential three questions::
  1. "Has the food been off for the full 48 hours?" (Transportation of spit-fed food tends to contaminate water quality)
  2. "Is it possible to video select the fish?" (in case it doesn't fit)
  3. "How do you pay for casualties?" （"The reliable merchants dare to promise 72-hour guarantee.)
• ‌Focus on avoiding pitfalls: Online shopping to choose a fishery that can be picked up, express koi discount rate of more than 30%

‌the principle of three non-corruptions‌

1. ‌not greedy for large amounts: Newbies buy 20-30cm subadults (highly adaptable, 1/3 the price of adults)
2. ‌not greedy for more: Maximum of 3 fish from the same fishery (different batches of fish are susceptible to cross-contamination)
3. ‌not greedy for beauty: blue background, gold scale and other special colors with caution (mostly drugged)

‌Let's be honest.‌

       Really good koi tend to be unassuming - a little wear and tear on the scales suggests a pond-raised, build-resistant fish, while those "beauty contest winners" with shiny scales in a glass tank may be discolored and sickly in a new environment. Remember, a fish that ignores you when you pick it out is usually tougher than one that chases you for food!