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In order to improve this 香水拉普拉塔situation, the park has adopted two methods of artificial control and biological control. "In addition to salvage and transportation, we have invested nearly 11.5 million yuan in various fish fry from last year to this year. Most of the fish we selected are grass carp, crucian carp and silver carp. These fish can eat submerged plants." After more than two years of continuous efforts With great efforts, the water quality of Yuehai Wetland has been further improved. At present, except for total phosphorus and chlorophyll, which are Class IV indicators of the national water quality standard, most of COD and ammonia nitrogen have reached Class III drinking water.