What is raw material for polyurethane wheels in Dajin caster ?
How to remove the smell of fish tank water? There is a fishy smell that the nitrogen system of clear water has not been established, and a small amount of water exchange and other nitrogen systems have been established. Naturally, there is no fishy smell.Water is as important to fish as air is to people.In the process of koi breeding, we often encounter the problem of fishy smell in the fish tank water, because the fish originally had some fishy smell, but sometimes the fishy smell is particularly large. what is the reason, in fact, there are many reasons for the fish tank's fishy smell, such as the filtration system is not very good, or there is no water change for a long time, and the fish's illness also causes the fish tank to stink. The following is a detailed analysis of the reasons.The reasons and solutions are as follows: 1. the filtration of fish tanks or fish ponds is not perfect, and the nitrate system is not perfect, it will lead to the accumulation of a lot of ammonia in the fish tank (the excr
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Good filter or self-cleaning filter Hello, both the laminated filter and the self-cleaning filter can be used as a pretreatment device for ultra-filtration reverse osmosis, and it is also suitable for the water quality of the Yangtze River, but the laminated filter and the self-cleaning filter have certain differences, analysis from the following aspects:1. filtering accuracy:1.1 optional filtering accuracy of self-cleaning filter 10-3000 μm;Filtering accuracy of 1.2 laminated filter is 5-200 μm;2. anti-washing water consumption:2.1 The water consumption of the self-cleaning filter is 0.5% of the water production;2.2 The reverse washing water consumption of the stacked filter accounts for 0.2% of the water production;3. anti-washing effect:3.1 The self-cleaning filter is a stainless steel filter, and the linear impurities in the water cannot be cleaned. The network structure is easy to cause the network hole to be blocked, and the bacteria will breed due to incomplete anti-washing;The 3.2 sta