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水温过高,影响鱼类生长,如青、草、鲢、鳙、鲤、鲫等鱼最适宜生长的水温为23-28℃,罗非鱼在25-35℃时生长最快。夏季要采取降温措施。恶水。水色淡红或综红,水面出现浮沫或油膜,水发生异味、异臭时,对鱼类生长极为有害。遇此情况,应放掉恶水,加注新水。透明度。一般富营养型水和鱼池肥水,透明度多在30-40厘米。若透明度低于20厘米,说明水质变坏;若透明度高于40厘米,则说明浮游生物很少,均不适宜鱼类生长。水中溶氧过低。最适
Water temperature is too high, affecting fish growth, such as green, grass, silver carp, bighead carp, carp, crucian carp and other fish the most suitable temperature for the growth of 23-28 ℃, tilapia at 25-35 ℃ fastest growth. Summer to take cooling measures. Bad water. Aqua pink or synthetic red, the surface of the foam or oil film, water odor occurs, the smelly, extremely harmful to the growth of fish. In this case, you should let go of bad water, add new water. transparency. General eutrophic water and fish pond fertilizer, more than 30-40 cm in transparency. If the transparency is lower than 20 cm, the quality of the water deteriorates. If the transparency is higher than 40 cm, there are very few plankton and are not suitable for fish growth. Dissolved oxygen in the water is too low. Most suitable