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I did a Web Browser Search: "how to identify hayward progrid de filter model number from serial number" . . . A workaround to estimate the model number based on filter dimensions. You can use the following method to estimate the filter size based on the measured length from the bottom to the...

Your device may not display the "true" color match as I may see with my cataract-corrected eyes . . . :wink:

My index card method . . . slide the card up and down to get match. It helps me better than using the thumb method to block above and below. I get a better display for my aging eyes.

Welcome! I'll let the experts answer you specifics, but I will comment: Pretty sure the above (y) is not accurate. As I understand it, once mixed in, the chlorine will not separate and "sink". The past two years, I've closed my vinyl liner pool just by waiting until the water temp is below...

Some info to get you started . . . Closing Pool for Winter - Further Reading :)

No problem. Same concentration. You just get more tests from a 2 oz. bottle than a 3/4 oz. :cool:

Reference: Salt - Further Reading "The most reliable salt test is the Taylor K-1766 Salt Test." (If, salt is all he wants to test...) :lovetfp:

Welcome. I'm confident you'll find this is THE website for information to maintain a Trouble Free Pool! (It is for me.) When you get a chance, Create Your Signature. That will give the responders to your posts a quick view of some vital information and tailor answers without you having to...

This article may get you started. DE Filter Use and Care - Further Reading :cool:

I especially had problems distinguishing the color before my cataract surgery. Similar to the dude, I found it helpful to block as much of the scale as possible so my eyes only saw one comparison. I simply slide the slot in my index card up or down and pick the closest result. A quick back and...

Mine fits inside the skimmer body, under the lid. Nothing to step on, except the lid. Zip tie is approximately 1/2 exposed above the water level inside.

I just use a zip tie around my Hayward basket handle (yes, the handle is "upside down". I found it easier to keep the zip tie positioned near the center without excessive tightening) . . . :cool:

Your grids appear to me to support the algae diagnosis. I would expect them to be almost as "White" as the new manifold. (I see more of a "Green" tint.) This is from my Hayward at the end of last season after Backwash, removing, and then rinsing with the water hose. For many years (before...

Sorry Bill, I didn't read your suggestion correctly ... But that's what I thought, as well. :cool:

Could the Collar use a Lid Support Ring ? :scratch: (Ref: Pentair Ring, Support Oem (new Style Lid) (85000600) - INYOPools.com )

Spring fixed my problem . . . ( Old on left, New on the right ) ;)

Just to clarify - the pH test will not get you back to "normal maintenance". Getting the CC to 0.5 or less, and meeting the other End-of-SLAM criteria will get you back. :cool:

Available from various sources . . . Search "pool bungee plugs" ;)

Welcome to the forum! I use "Skimmer Sock" in spring to catch most of the pollen, then switch to "Hair Net" for the rest of the season. There are various brands. For hair nets, Spun Poly work well. ;)

I use a "Manual pH Test Color Determination Filter". (Slot cut on a white index card.) Until I got the cataract taken care of, the test was Really giving me fits, closing the bad eye and trying to see the color with my "good" eye. 👁️

My local BJ's Wholesale usually stocks Austin's; However, only at the beginning of the season. They normally don't check membership to go in and look around, only at the register . . . May be worth a try ?