16. Make use of a high-efficiency, thiet ke ho ca koi out-of-pond pump that conserves electricity. By operating it thiet ke ho ca koi 24 hours a day, a high-quality biofilter (such as thiet ke san vuon one made by Aqua Ultra thiet ke ho ca koi Violet) will receive a continuous flow of oxygenated water, which the anaerobic bacteria require make sure to enjoy. The bacteria are required for wearing down hydrocarbons, nitrates and nitrites in drinking water.
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