Chlorine loss during slam

Jump to latest Follow Reply
The precise level of sand is not critical. If you remove the mpv (that's the valve), you may find a mark on the inside of the tank. If not, don't worry. Make sure your sand is around 2/3 full. All you are doing in making sure it is not excessively low (like 1/2 or less)

That you brushed the sides and got some "dust" is a good thing again.........you're making progress.

Keep doing the SLAM.......I think you are getting closer and closer to a clear pool
 
Hello I would like to provide an update. Have been continuing the Slam process and increased my free chlorine to 17 as my cya tested at a 43 today. I still have quite a pretty blue pool that is cloudy with about 18 in of clouded visibility. I'm concerned that my filter is not doing its job and so I believe I'm going to open up my sand filter by removing the MPV and inspecting the sand. My question is is there any indicators of contaminated or failed sand that I should look for that would require a replacement? I will check the level to see if it's 2/3 full and can just top it off if so or reduce as required. Just want to know what to look for that would indicate that I should scoop the sand out and replace it all? Thank you for your time and attention to responding to my post.
 
And lastly before I remove the MPV I assume I should open the drain of the sand filter to allow it to drain? And if I have to replace the sand should I allow the sand filter to drink completely first before scooping?
 
I suppose it could be clumped up badly but I doubt it. I believe you may have some debris on the top of the sand bed but that shouldn't be an issue. So you are really only checking the level of sand to make sure you have enough.
 
As the level of sand and it's condition are an unknown I think it's prudent to open up and have a look. Not only to inspect the level but to check its condition. What visual indicators are there of contamination, or sand that needs to be replaced?
 
I didn't post very clearly above. I think the only things that could be worrisome is the sand is in solidified clumps or organic debris pile on top of the sand bed. I doubt you will find either, but a visual inspection will confirm that. There will likely be a small amount of debris but probably very little and you can scoop that right out.
 
Thank you so much for the clarification it is so very much appreciated. I will have a look for those indicators and check the level and go from there. I've also decided to add a 50 gallon per minute cartridge filter in line post sand filter to increase my filtration. I can't imagine that wouldn't accelerate the process and the cleanliness of the pool full time. After doing the math for extended slam process and the additional chlorine expense and 24/7 running of the pump I'm sure it will pay for itself by the end of the year. And if not after opening next year.
 
After absorbing as much information as possible on the tfp website in previous threads of other users slamming their pool utilizing only a sand filter it seems like we all are happy with the process except for the time it takes for a sand filter to clear a cloudy pool versus users with cartridge or de filters. I have read that adding a cartridge filter accelerates the clearing of the pool especially those users who have achieved .5 PPM of CC and less than 1 PPM of FC loss overnight. I have a pretty blue pool that has met two of the three requirements of the slam process and after 13 days of the slam process I still have a quite cloudy pool that visibility has only marginally increased over the past 7 days. Is it not your opinion that adding a cartridge filter to the system would accelerate the clearing of my cloudy pool? Other users that have commented on my situation and others like me say it takes forever for a sand filter only to clear the pool.
 
You can try adding POOL DE (use only POOL DE) to your sand filter, should help...buying and plumbing 2 filters isn't really needed, appropriate, nor recommended. If you wanted to replace the filter, that would be ok, but not necessary, it will clear.


www.troublefreepool.com

Add DE to a Sand Filter

A clean pool filter will increase the efficiency of your pool! ... your filter are to backwash it, clean the manifolds and grids, and add new DE.
www.troublefreepool.com www.troublefreepool.com
 

Enjoying this content?

Support TFP with a donation.

Give Support
You must log in or register to reply here.
Top Bottom
Back
Jump to latest Follow Reply