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 Post subject: Pentair Cartridge filter and diatomaceous earth
PostPosted: June 6th, 2011, 10:59 am 
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Joined: May 31st, 2011, 3:48 pm
Posts: 141
Location: Los Angeles, CA
Hello all!

The manual of my pentair 420 clean and clear plus (brand new installation) calls for adding some diatomaceous.

The pool guy who installed it did not add any and says it does not need it and will clog the filter prematurely.

What do you guys think of this?

Thanks!



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Suley, West Hills, CA
IG 23000 Gallons with IG Spa Gunite plaster, Pentair Intelliflo Variable Speed 3HP, Pentair Clean and Clear Plus 420 Cartridge filter, Teledyne Laars One series 400,000 BTU Nat Gas Heater, Hayward Max Flo 1HP Single Speed Spa pump, Noisy Spa blower, Dolphin Deluxe 4 robotic vacuum.
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 Post subject: Re: Pentair Cartridge filter and diatomaceous earth
PostPosted: June 6th, 2011, 11:10 am 
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Joined: May 7th, 2007, 3:03 pm
Posts: 28139
Location: Silver Spring, MD
It certainly doesn't require DE to work correctly. Adding DE will increase the flow resistance a little and it will also make the filter just slightly better at filtering very small particles. If you do add DE, make sure you only do so once (until you get a new cartridge.



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19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
TFP Admin. Creator of The Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School
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 Post subject: Re: Pentair Cartridge filter and diatomaceous earth
PostPosted: June 6th, 2011, 11:29 am 
Registered User

Joined: May 31st, 2011, 3:48 pm
Posts: 141
Location: Los Angeles, CA
Thanks!



_________________
Suley, West Hills, CA
IG 23000 Gallons with IG Spa Gunite plaster, Pentair Intelliflo Variable Speed 3HP, Pentair Clean and Clear Plus 420 Cartridge filter, Teledyne Laars One series 400,000 BTU Nat Gas Heater, Hayward Max Flo 1HP Single Speed Spa pump, Noisy Spa blower, Dolphin Deluxe 4 robotic vacuum.
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