The tank with bottom mud densely planted with water grass should be called grass tank, and the tank with bottom mud is called pulverization. First, feces and mud pulverization are two concepts The excrement in the soil gap in the straw jar is generally not cleaned up by the bacteria in the water, and these feces scattered in the gap are the best source of nutrition for plants. For example, if you plant a pot of flowers, will you clean the fertilizer in the soil? If you feel more ugly than feces, you should reduce the breeding density and properly control feeding. On the contrary, the pulverization of soil means that the soil is dispersed from the original particles into powder after being used for a long time, and the bottom mud after pulverization will starve the roots of plants and then rot. Therefore, the straw tank using bottom mud shall be turned over for a maximum of two years to replace with new bottom mud. Turning the vat is to remove all plants and fish, find a large container to keep the water in the original vat (at least 2/3 or more), and then the remaining water and powdered mud Pour it out, re lay the bottom mud and base fertilizer, etc., and then pour back the water in the original tank before entering the organism.
