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Understood, but again I was only backwashing when the pressure went WAY up, not because it was the fashionable thing to do. Believe me I'd not want to touch the thing for months if possible. Now, after all this, my pressures look great and the pool is crystal clear. All the measurements are in...

FC not holding. Was 0.5 this morning. Do I need another SLAM?

Nope. Only been backwashing it more these days due to issues with clogging. Very infrequent in the early days. Now that the filters seem much cleaner I'm gonna leave it alone.

Still looks amazingly clear. I dare say even more clear than the crystal clear I was used to before all the filter issues. Perhaps a once-yearly TSP/acid wash is in the cards. Or just having the spare set helps. Today's numbers - I haven't added or touched the chemistry since before the party...

My clarity was this way before. Only recently have been having issues. But definitely notice a flow difference after cleaning the filters. Can I turn everything back on to auto (including SWCG)? Also I did a very quick backwash - like maybe 10-15 seconds. I didn't put any more DE in because I...

Party went great. Was able to run water features at roughly half pump speed rather than full. Degrading slightly as party went on. Did a quick backwash after and will let filter clean up from here.

Yes, I want that. Where did you buy it? Drop-in replacement? My FC isn't changing - still 32 solid. I haven't had any supplemental chlorine production for a while now but its holding steady. I should maybe turn the solar on but I think the pool is warm enough already so likely won't. I was...

Original.

Oops my bad. Sticky gauge. 12.5!

15.5 [emoji27]

Water clarity is phenomenal this morning!

LOL. I run the pump the whole time during a party (a bit noisy but) so that the deck jets, waterfall, and bubblers can be on. I am considering a quickie "outdoor shower" setup so that people can rinse off BEFORE getting in the pool. Also adding a full bathroom right next to it so that they don't...

Not all at once :)

Haha! We do have a lot of shade. Here's a pic of it right now (3:25pm) and already starting to shade.

Yup. I'm interested to see how the party goes. We have over 50 people coming.

The important thing will be how quickly they clog.

Similar pressures at full pump speed and after adding DE. I then ran pump at button 2 speed(I'll look up the rpm setting later) and recorded it on the dial on the pressure gauge at 12.5psi.

I wouldn't say that. Maybe a slight texture improvement. I'm repeating the process with my spare set of cartridges now and will never again use them without DE.

Much whiter after acid soak. Look like new now. Those are my original filters. 7 years old.

Filters cleaned and replaced. CYA around 70. FC 32. Safe to swim? Some photos of the day so far... Before cleaning: After TSP soak and rinse: After acid soak and rinse: Back in place:

Shock level maintaining at 32-33ppm. At tad over target but am letting it drift down. Water noticeably cleaner today. Filters soaked overnight in detergent, about to rinse and acid wash. Then install, add DE and see what shakes down.

Will do. Just about to SLAM to 30ppm after adjusting pH down a little and adding some water to lower CYA. You said it was safe to swim in 30ppm!?

For cleaning do you recommend soak ONLY, or scrub with a brush after they've been soaking, followed by a rinse, followed by acid wash?

I have plenty of DE on hand but my concern is the cartridges right now. Both sets have been run without DE so they may be causing the issues so I first need to address that and get some clean filters in there, load with DE and only then do the SLAM.

Fair enough. So do you agree, Matt, that my current plan should be to SLAM while also TSP/acid wash filter cartridges to avoid them plugging up so quickly?

I can SLAM but given I have a party Tuesday should I wait til after that? I don't want the FC level to be 30ppm when my guests arrive.

5:50am, FC measurement 5.5ppm What next?

TSP I will try to find some. Should I just soak them in a giant garbage can (new/clean of course)? 9:30pm, FC measurement 6.5ppm Stay tuned for 5:50am measurement :( Jim, could be algae. I need to clean those filters I think (running without DE on both sets is not good apparently). I do have...

FOUR kids. Wow. I only have the one. That's enough! So, for TSP, where would I find that locally and what ratio to mix it in? Giant garbage can method? How long to soak, etc?

My pool builder claims my filter is oversize for my pool. If I had your situation I would be as happy as a lark. My plan for now is: 1) Run OCLT and report back 2) Buy giant trash can and acid wash filter cartridges using procedure found in owners manual 3) Change filters out and add proper...