Adding Cellulose Fiber to sand filter

[Blake1989]

So I’m aware on how to add DE or DE substitute into a sand filter, and to add a cup until you hit +1 PSI on the gauge. I added about 6 cups of cellulose fiber to the filter, which according to my experience with other pool owners typically takes 2 cups for for the PSI to raise by 1.

I also gave it 2 minutes to stabilize per scoop. I have a 24 inch Hayward Pro Series sand filter, S244T. Never thought it would take at least 6 scoops! I unfortunately ran out of fiber after 6 cups, so I will monitor the pressure gauge.

Any thoughts?

 

[Richard320]

Waiting for your update.

 

[Blake1989]

Waiting for your update.

It’s still the same pressure after 6 cups. I’m dumbfounded.

 

[Vickery]

I have used cellulose a few times, primarily to trap precipitated iron. It would take about 36hours to become effective...then it really slowed things down.

 

[Blake1989]

I have used cellulose a few times, primarily to trap precipitated iron. It would take about 36hours to become effective...then it really slowed things down.

Did you notice an increase in filter pressure when you first added some? How many cups did you use?

 

[Blake1989]

Just got off work and checked the pressure. It has gone DOWN 1 PSI. What the heck?

 

[Vickery]

I didn't notice a rise in pressure for about 24 hours or so. Then it jumped up 10psi. The cellulose didn't seem to have much effect by itself, it just caught everything else. Which it is supposed to do. As I remember, about 4 cups. It was a 14K abg pool. What are you trying to filter out?

 

[Blake1989]

Fine particles, I have a slight haze in my water.

 

[Vickery]

Let it run. Depending on the size of particles it may take a while. I'm assuming that your chemistry is otherwise in spec.

 

[Blake1989]

Yes, it is.

CYA: 40
FC: 7
TA: 70
PH: 7.2

 

[Vickery]

Patience is a virtue.