Swimming Pool Drain

pool the size of two sub-pools, large pools of 55 square drain for 63, small water drain for 35 to 63 side, may I ask how long it can end row. In this case, to maintain a day-for-two times the water of the longest and the shortest time and how long? If the rate of pump how long? (Note: The outfalls are installed to drain.)

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tell me what is an easily get to all issues

do not know why you have to change the water pool, and now are basically a swimming pool for one year for a