3 Water volume and water level control: When the size of the fish to be put in is small, the flow of water should be small. With the growth of the fish, the flow rate should be gradually increased. From 10 cm to 1 kg of commercial fish, the water level should be increased gradually from 50 cm. Up to 150 cm. 4 water temperature control: It is best to keep the pool water temperature between 18 °C ~ 24 °C, the maximum water temperature should not exceed 28 °C. Light Color Pieces Walnuts Kernels Light Color Pieces Walnuts Kernels,Walnut Kernels Light Quarters,Natural Walnut Kernels Light Amber,Walnut Kernels Light Amber Weishan Yuanxing Walnuts Co.,Ltd. , https://www.walnutsxxy.com
2 Oxygenation: When the water source is insufficient and the water temperature of the pool is high, the oxygen can be used to increase the dissolved oxygen in the water. 
Carp daily management note
A: 1 Regularly clean the bottom of the pool: Clean the bottom of the pool once a week to prevent accumulation of residual baits, feces, defoliants, etc., and algal germs. When sewage is discharged, lower the pool water to 1/2 or 1/3 or so, and increase the discharge rate of the pool water. Sweep cleanly while discharging. Make every effort to discharge the waste in the pool and remove the sick fish and dead fish in time.