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Blind calcium supplementation may lead to high blood calcium, kidney stones, nutritional imbalance of mineral elements, even heart disease, prostate cancer, etc., and must be stopped. There are three factors to consider calcium deficiency. Clinical examination shows calcium or vitamin D deficiency indication (such as low bone density, high alkaline phosphatase, high calcium phosphorus product); The concentration of vitamin D in blood was normal; Low calcium intake (e.g. <3/4 recommended).
Self-cleaning filter features: continuous water supply is carried out in the backflush, and the whole backwash is achieved in every point of the suction net filter. The anti-flushing is only a small local pressure change between the suction nozzle and the fine filter screen, while the movement of the collector and hydraulic cylinder does not affect the normal water supply. At the same time, the amount of water consumed during the backflush is very small, with the flow rate of 300m3/ h. For example, the reverse flushing flow rate is 35-40m3 / h, the anti-flushing time is 7-15 seconds, and the backwash amount is 80-160L
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