HTH is a brand of pool products. Every 4 or 5 weeks I will buy a packet of the HTH powdered supershock and throw it in the pool and let the pump run all night to filter the water. Your water will not be as clear after 4 or 5 weeks no matter what you do. So, just add the HTH supershock and by morning the water will be as clear as when you first opened the pool.
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