Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 13 of 13

Thread: Cartridge Filter Can't Keep Up

  1. Back To Top    #1

    Join Date
    Jul 2016
    Location
    Jamesville NY
    Posts
    5

    Unhappy Cartridge Filter Can't Keep Up

    Hi folks,

    This is my first post to the forum. My husband and I are a little stuck and don't know what to do. I grew up with a pool at my parent's house and worked for three years as my summer job in a pool store, so when we bought a house with a pool, I was comfortable with basic pool chemistry balance and clean-up procedures. However, what we were faced with turned out to be out of the ordinary. Although the pool was covered when we got it, it either wasn't closed properly or went an entire season without a cover. It was only half full and the water was BLACK. Once we filled it with water and got to scooping, we found about a truckload of leaves and dirt at the bottom. Lots of scooping and chlorine brought it to blueish murky fog. And that is where we sit now. I am still continuing to shock it to keep up with the algae.

    The 24' above-ground pool came with an Aquatools AT84100 Cartridge Filter. At the beginning of this mess a couple of weeks ago, I replaced the cartridge with a new one (Sta-rite). It has been working fine. But because the pool has so many particulates in it, we are finding the water pressure from the return line decreases significantly within just a couple of hours of use after each time we clean the filter. We know we need to clean the cartridge often, but every two hours isn't feasible - we both work full time. My husband is concerned that the pump will overheat if we run it at this state, so because of that he is only running it a few hours in the evenings and then turning it off before we go to work or to bed. Unfortunately, that amount of filtering isn't going to clear this pool! I know that ideally we should be running it 24 hours for at least a few days straight while at shock level.

    This is my first time ever working with a cartridge filter; I've always only used sand. Any tips on how to clean up an murky, algae-infested with a cartridge filter? How much can you run it between rinses and are our fears of overheating the pump valid? We would appreciate any tips to get us through this mess to clear it up! Thanks!

  2. Back To Top    #2
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,930

    Re: Cartridge Filter Can't Keep Up

    Hello and welcome to TFP! Your problem isn't with the filter or type of filter, it's chemistry. You have algae and no amount of filtering will kill algae. For that you need chlorine, but the precise amount. That's where the testing comes-in. What test kit are you using? Is it a TF-100 or Taylor K-2006C?

    Also, please add your pool info to your signature by going to the top of the TFP web page (just under the Pool School button) and select "SETTINGS". On the next page look to the left for a menu bar that says, “MY SETTINGS” and go to "EDIT SIGNATURE" to enter your pool and equipment info there. Or you can click EDIT YOUR SIGNATURE. It will help us later. This link may also help you: Pool School - Read This BEFORE You Post.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  3. Back To Top    #3
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: Cartridge Filter Can't Keep Up

    Pat handled the chemistry part, so I'll concentrate on the pump and filter. As long as there is some flow through the pump, you don't have to worry about it overheating. It's only if the flow stops completely that you need to worry, and that is very unlikely to happen from algae clogging it up.

    One issue with a cartridge filter is the fact that it requires cleaning frequently when trying to clear algae.
    Unless the old filter cartridge was torn, I'd clean it up and then you could swap filters when they needed cleaning.

    The best thing you can do is get good test results, as Pat said, and go from there.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  4. Back To Top    #4

    Join Date
    Jul 2016
    Location
    Jamesville NY
    Posts
    5

    Re: Cartridge Filter Can't Keep Up

    Thanks, guys! I have to admit I have been SLAMing the pool, but not with the high-end test kits. I have been double-testing with the less expensive ones to ensure my chlorine is at shock level and that we have CYA. I know the high-end ones are valuable, but with the move to a new home we have been inundated with expenses and the $100 price tag was disconcerting! I guess I will have to poney up. But just to be clear with what Texas is saying: say the chlorine level is perfect. The water still won't clear up on its own without the filter running to remove the dead algae, correct?

  5. Back To Top    #5


    TFP Guide

    domct203's Avatar
    Join Date
    Jun 2015
    Location
    CT
    Posts
    3,373

    Re: Cartridge Filter Can't Keep Up

    Quote Originally Posted by Katrinamp View Post
    Thanks, guys! I have to admit I have been SLAMing the pool, but not with the high-end test kits. I have been double-testing with the less expensive ones to ensure my chlorine is at shock level and that we have CYA. I know the high-end ones are valuable, but with the move to a new home we have been inundated with expenses and the $100 price tag was disconcerting! I guess I will have to poney up. But just to be clear with what Texas is saying: say the chlorine level is perfect. The water still won't clear up on its own without the filter running to remove the dead algae, correct?
    The chlorine will continue to oxidize everything in the water, dead or alive, but yes, you need a proper filter to get all the particulates (dead algae and such) out of the pool.

    If you can keep scooping debris out of the pool it will help tremendously. As the water gets cleaner it will require less and less cleaning of the filters.

    Also, it is very important to keep the water circulating to help expose as much organic matter to the chlorine as possible. Do you know if it is possible to run the system without filters in it while you are away, or bypass the filter (like recirculate mode on a sand filter)?

    If not, a cheap submersible pump could also be used.

    Also, if you desire to follow TFP procedures, you will need a FAS/DPD chlorine test kit. It is impossible to do an OCLT without it, which is required to complete your slam.

    Dom
    Dom - TFP Guide
    Intex 18' X 48" Ultra Frame AGP 6700 gallons | Two Intex CS8110 SWG's | Hayward Pro Series 21" Sandfilter | Hayward 1.5HP Power Flo Matrix pump | Hayward Thru-wall Skimmer | Wanda the Whale | 72 sq ft of Sungrabber Solar Panels with Hayward GLC-2P-A | Taylor K2006 Test Kit, Sample Sizer & Speed Stir | Click Here To Become a TFP Supporter!

  6. Back To Top    #6
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,930

    Re: Cartridge Filter Can't Keep Up

    Once you know there is no live algae, residual cloudiness could be from algae carcass waiting to be filtered. In addition to keeping chemicals mixed and flowing, that's why on the SLAM page it reiterates to keep the pump running 24/7 to help with filtration.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  7. Back To Top    #7

    Join Date
    Jul 2016
    Location
    Jamesville NY
    Posts
    5

    Re: Cartridge Filter Can't Keep Up

    Quote Originally Posted by domct203 View Post

    Also, it is very important to keep the water circulating to help expose as much organic matter to the chlorine as possible. Do you know if it is possible to run the system without filters in it while you are away, or bypass the filter (like recirculate mode on a sand filter)?

    Dom
    Yes, we can bypass the filter and I have considered trying that, too. Thanks!!

    - - - Updated - - -

    Thank you, everyone for your help. I feel less lost now. BTW, I swear I added a signature but I'm apparently as good at that as clearing a pool!

  8. Back To Top    #8


    TFP Guide

    domct203's Avatar
    Join Date
    Jun 2015
    Location
    CT
    Posts
    3,373

    Re: Cartridge Filter Can't Keep Up

    Quote Originally Posted by Katrinamp View Post
    Thank you, everyone for your help. I feel less lost now. BTW, I swear I added a signature but I'm apparently as good at that as clearing a pool!
    LOL, don't worry, if you do this right you should never have to do it again.

    Dom
    Dom - TFP Guide
    Intex 18' X 48" Ultra Frame AGP 6700 gallons | Two Intex CS8110 SWG's | Hayward Pro Series 21" Sandfilter | Hayward 1.5HP Power Flo Matrix pump | Hayward Thru-wall Skimmer | Wanda the Whale | 72 sq ft of Sungrabber Solar Panels with Hayward GLC-2P-A | Taylor K2006 Test Kit, Sample Sizer & Speed Stir | Click Here To Become a TFP Supporter!

  9. Back To Top    #9

    Join Date
    Jul 2016
    Location
    Jamesville NY
    Posts
    5

    Re: Cartridge Filter Can't Keep Up

    Hi Everyone,
    I'm back! We are still struggling.

    So I got the 2005C and used your pool math calculator to get our chemicals in the proper balance and shock level. Right now we are at 29FC, 50CYA, 7.5ph and 110 Alk. The pool is still a cloudy, murky mess. But our filter seems to be clogging up at a very high rate. The PSI on the filter is reading around 30 when we start it with a rinsed filter and goes up to about 45 within a half an hour! The flow rate out of the return is very low. Any thoughts?
    24' Above Ground Located in Central New York
    Aquatools AT84100 Cartridge Filter

  10. Back To Top    #10
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,476

    Re: Cartridge Filter Can't Keep Up

    With a cartridge filter, you are probably better off bypassing it until all the algae is dead and starting to sink to the floor of the pool. At that point, you can vacuum to waste so you aren't constantly clogging the filter and having to clean it. With most of the dead algae removed, you can then start to filter as normal.

    Otherwise, if you use the filter to do most of the clean up, be prepared to clean it frequently during the process.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  11. Back To Top    #11

    TFP Guide

    In the Industry

    Join Date
    Apr 2015
    Location
    tucson, arizona
    Posts
    938

    Re: Cartridge Filter Can't Keep Up

    Sounds like it would've been easier to drain,cleanout, disinfect everything and start out new

  12. Back To Top    #12

    Join Date
    Jul 2016
    Location
    Jamesville NY
    Posts
    5

    Re: Cartridge Filter Can't Keep Up

    Quote Originally Posted by mas985 View Post
    With a cartridge filter, you are probably better off bypassing it until all the algae is dead and starting to sink to the floor of the pool. At that point, you can vacuum to waste so you aren't constantly clogging the filter and having to clean it. With most of the dead algae removed, you can then start to filter as normal.

    Otherwise, if you use the filter to do most of the clean up, be prepared to clean it frequently during the process.
    Yes, we are leaning towards this method. So I was thinking of circulating it for chemical circulation about 12 hours/day and then letting it settle for 12 hours followed by vacuuming and then wall scrubbing, then repeat. What do you think?

    - - - Updated - - -

    Quote Originally Posted by kadavis View Post
    Sounds like it would've been easier to drain,cleanout, disinfect everything and start out new
    I was under the impression homeowners should never drain a vinyl-lined above-ground pool (unless to replace a liner) due to the risk of shrinking the liner and possibly having to shell out thousands to get it replaced...
    24' Above Ground Located in Central New York
    Aquatools AT84100 Cartridge Filter

  13. Back To Top    #13
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,476

    Re: Cartridge Filter Can't Keep Up

    Yes, we are leaning towards this method. So I was thinking of circulating it for chemical circulation about 12 hours/day and then letting it settle for 12 hours followed by vacuuming and then wall scrubbing, then repeat. What do you think?
    Sounds like a good plan.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •