First test with k2006

[Bondo]

Thanks for the reply.

The pool is pretty clear in daylight. I have some small white particles that I can see underwater with goggles. I can also see at night in front of the light. There seems to be a lot of them. Cloudy haze in front of light at night and can see particles. Really fine and mostly float on top and skimmers (2) don't seem to be able to pull them down. I figure this may be a problem for a different post.

Thanks for the tip on the FC test.

I have poked around the Taylor website some and will look for the information you suggested. I will work to get the CYA bumped up. The advice on the sampling is really appreciated.

[nefretrameses]

At 80 degree water temp. you have a saturation index of +0.3. That's not so bad. You could try to reduce your TA to like 80. There's a sticky on how to lower your TA (basically lower Ph way down and then aerate). Although you should give priority to the levels required by your SWCG system I think. Your Ph is also a tad higher than it could be. My point being a positive saturation index indicates that you are more likely to get scale. So what you may be seeing is suspended preciptation.

I'd bet that your sand filter needs attention. It doesn't seem to be getting the particles, cause your chemistry is just not that bad. Do the DE test. Pour a cup of DE powder into your skimmer. Watch a return and if you see a cloud of DE returning, your filter needs attention. I have read about many with sand filters who use DE on a regular basis because it provides filtering for amaller particles. After backwash, they replace it. If the pool is 8 years old and the liner seems to need attention, I'd bet that the same attention was paid to every other system in the pool.

With regard to salt testing, Doc has a sticky for finding the best test kit in "Testing and Adjusting Pool Water Chemistry". He recommends AquaChek salt strips for salt, or the Taylor k-1766. Both can be tricky to use. Strips require immersion for at least 5 and probably 10 minutes.The drop based kit is more accurate.

Read more, there's lots to learn.

[Bondo]

Thanks again for the advice.

Upon your recommendation and further research on this forum, I have decided to lower my TA to around 80. I already have it down to 120.

I did the DE test on the filter and could not see any shoot back through the returns. Pump pressure went up a little over a pound ad has went up three more pounds in the last 36 hours so it may be starting to catch some of the particles.

Water seems to be clearing. Last night the particles didn't seem as bad in front of the light.

I still believe that I have some sand filter issues though. There is a small amount of the fine sand collecting on the step that has not been there before. I can tell a difference between that sand and the sand from the concrete which also collects there.

I will update the results again after these changes.

I have the CYA but am going to wait until I am through lowering TA.

I am also putting priority on tracking SWCG to determine right runtime/percentage.

PS--Source water TA high as well
FC--2.5
CC .5
pH--7.2
TA--160
Ch--150

[nefretrameses]

So after a 5 psi rise at your filter, you should backwash then add more DE. I agree that the pressure rise is an indication that you are filtering more junk. And if its noticeable as well, it shouldn't take long to clear.

It takes a few days for the CYA to dissolve enough to register on the test. You could start getting it in there now so that when you jumped through all the other hoops your test will be pretty good. With low CYA you will be losing more FC than you need to during the day. Remember FC tracks with CYA - the higher the CYA, the higher your FC needs to be. Check out the best guess chart for guidance.

Sand from concrete? I imagine you mean from your concrete deck. If you're getting sand from your filter in the pool, your filter will need a look. It should have returned some of the DE, but maybe its a backwash issue. I've read about a "rinse" cycle after backwash??? I'm not familiar with sand filters except what I've read here.

I can't help you with the sand filter or the SWCG. I'd suggest that you start a new thread for each of these if you need further help. There's a lot of pretty talented folks at your disposal. I'd post specific make and model number of the device along with current test numbers. They will ask you anyway.

Let me know how it goes.