- Jun 16, 2009
- 44
Should a clean sand filter have the same pressure on backwash as it does on recirculate. I am helping friends slam, and the filter pressure is barely increasing...I am wondering if the sand is just not as effective as my DE filter? I added DE to the sand once yesterday and raised it 1 psi, then the filter raised on its own in a couple of yours, enough to warrant backwash. But now the filter has only raised 1 PSI all day running without DE. Water is holding FC overnight now, but water is still cloudy.