1. Glucose Water Supplementation

• Add 100 ml of 5% medical-grade glucose solution per ton of water (approximately half a cup).
• Glucose molecules are small and can be partially absorbed through the gills and skin.
• Use only once a week to avoid over-fertilizing the water.

2. Mineral Slow-Release Support

• Hang coral bones or maifan stones in the filter chamber or pond corner (about 500 grams per ton of water).
• These slowly release minerals such as calcium and magnesium, helping to maintain electrolyte balance in the fish.
• Minerals can be absorbed through the skin, aiding energy metabolism.

3. Vitamin Bath Care

• Use aquaculture-specific vitamin C effervescent tablets, dissolving one tablet per ton of water (containing approximately 500 mg of VC).
• Perform twice a week, each session lasting 2 hours (can be combined with an air pump for oxygenation).
• Enhances stress resistance and reduces energy expenditure during the fasting period.

4. Probiotic Environmental Support

• Add EM bacterial solution to the water (50 ml per ton of water) once a week.
• Promotes the breakdown of organic matter in the water, indirectly increasing absorbable microbial nutrients.
• Helps maintain intestinal flora balance in koi, improving nutrient utilization efficiency.
  

Important Notes

• All additives should be fully dissolved in water before being added to the pond.
• During fasting, maintain clear water quality and test ammonia levels daily (<0.2 mg/L).
• If koi show significant weight loss, consider briefly resuming minimal feeding (e.g., a very small amount of wheat germ feed daily).

Summary in One Sentence