New House - Old Pool, trying to get in order

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Vacuuming for the first time and return jets are kicking out tons of sediment. Does this Imply an issue with my filter? Or is it normal?

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Pressure increased from 15 to 28. U would backwash but the cya directions said not to backwash for 48 hours?? Should I backwash?
 
You can backwash. That statement was placed there for people who may have mistakenly dumped the granules into the skimmer which would've required more time to dissolve. You used the sock method correct? So once it was all dissolved into the water, it's in. SO once your filter increases by about 20-20% pressure, which it seems to have, go ahead and backwash. Now after you backwash and rinse really well, watch when you place it back into filter mode. That sediment issue should stop. If it doesn't try to grab some of it with a nylon over the return jets to see if it's slimy/squishy (algae) or gritty (sand). If it's sand, you'll need to go into the filter to see why sand is blowing past the laterals into the pool.
 
There is still a lot of sediment in the pool. It clogs quickly when vacuuming. Should I add water and vacuum to waste? I don't Th8nk the pool will clear with all this crud on the bottom.
 
You sure can vacuum to waste! Fill the pool to the top of the skimmer face. Have the hose running while you vacuum to waste. Make sure to keep an eye on the water level and don't take it too low. Remember you will be messing with your CYA and FC levels when you so this.

Do you think the stuff is big enough to net up if you have a deep pocket net?

Kim:kim:
 
Pool is slowly, but surely getting better. I could finally see the bottom in the deep end. Will continue to vacuum aggressively and maintain a high FC level, but I think I've about got it licked. Next step, I believe will be trying to remove the stains. From other posts on here, I believe that ascorbic acid is going to be my best bet. Any guidance in this direction would be helpful - get the pool crystal clear first? Add the Ascorbic acid before getting the pool totally clean & clear? Other tips? Thanks.Pool32718.jpg
 
Yes, definitely complete the SLAM and ensure the water is crystal clear. That's a must before attempting any ascorbic acid treatment for stains. Maintain and be as patient as you can as this is the tail-end and it's tough to wait when you're so close. Keep brushing everywhere and backwash as needed. Looking better!
 

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I think I finally got essentially everything in the pool vacuumed out. No more sediment as far as I can tell. Here are my readings from yesterday -

FC - 22ppm
CC - 1ppm
Ph - 7.6
TA - 225 to 250 (Did the 10mm test and it turned purple at 9, to red at 10)
CYA - 50

So, just keep FC constantly above 20 and wait? Brush and vacuum as needed? Anything else I should be doing? Likely will need to put in some muriatic acid to reduce the TA?? Based on readings of other threads, I think I will probably need a metal sequesterant to use when I do the ascorbic acid to keep stains from recurring. Any specific sequesterant that I should use? What should I do next? Lower the TA, or try to tackle the stains?
 
Great progress!!

Next step is to keep the SLAM going. Nothing else. You are not done until you meet all 3 criteria.

  • CC is 0.5 or lower;
  • You pass an OCLT (ie overnight FC loss test shows a loss of 1.0 ppm or less);
  • And the water is clear.

No reason to measure anything but FC & CC (when the water is clear) right now. pH readings are inaccurate with FC above 10. TA & CYA will not change with chlorine only adds.
Sorry I cannot speak to the sequestrants and will have to let the experts chime in.
 
If the stains are just from the leaves and junk that were on the bottom, they may lighten and eventually go away with time (chlorine). You can test this out by resting a puck on them for 30ish minutes and see if it lightens in that spot.

I spend lots of time in the summer moving pucks around the pool getting rid of walnut, acorn and other annoying stains :shakesfist:
 
Test your pool's FC in the early evening when the sun is off the pool. Using Pool Math dose the FC to 2 ppm up from what the first test showed. Make sure the pump is on while you are doing this. Wait about 30 mins and retest the FC. Was it were it should be according to Pool Math? Then you have the correct gals for your pool. If the FC lower then your pool might be bigger than you thought. If it is higher than the pool might be smaller than you thought. Adjust the size of the pool 500 gals at a time until the test starts showing you have the correct gals.

Kim:kim:
 
I have now passed the 3 tests for a SLAM - Clear water, No CC, OCLT < 1ppm. Now what? Test everything and go from there? I have only been testing FC & CC.
 
How about a fresh picture of the pool. We'd love to see the final results. As, to your question, test your pH, TA, and CH and go from there. Monitor your pH and if you find that it tends to climb rather quickly, you could try adjusting your TA down to try and slow the pH rise a bit.
 

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