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- by ovion21
- Wed Dec 05, 2018 9:59 am
- Forum: Filtration
- Topic: Pool filter sand
- Replies: 12
- Views: 7579
Re: Pool filter sand
I have been noticing in one of my tanks that has pool filter sand, the sand at the bottom of the tank it turning blackish gray. The tank does not smell and after I do a water siphon, the sand from the bottom comes up and I see the color change. After about 12 hours or so the black sand disappears. ...
Search found 1 match
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