Do I have to change the sand in a pool filter?
Md Ariful Islam
বিএসসি(সিএসই)
,
এমবিএ(মার্কেটিং)
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1 Answers
Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
Every other year I skim an inch or so off the top of the sand and then add some new sand to reach the right level.
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Answered