Moved in a year or so ago right at pool opening. Prior owner was from family that owned pool business - water was in great shape at opening (crystal clear) - stayed very stable for couple months just popping a few pucks in chlorinator every week. I didn't have time to learn so I was paying pool guy $35 for weekly visit.
There were some iron stains on the bottom of the pool (gunnite). Was advised we needed to lower the chlorine so he could treat them. Took almost a month for FC to drift down to zero from 5. Then pool guy treated for metal stains, which didn't really work, and the water has never been right since.
Water was cloudy for probably a month - finally got clear right at end of season. I have old invoices showing FC was regularly between 0 - .5 and CC was .5 - 2.0 during this time. Closed pool with FC at .5, CC 1.0, TA 120, CH 300, CYA 85 (don't trust his CYA #'s as they jumped around a lot week to week and now I know that was highly unlikely). The pool was clear at the time of closing after a lot of expense from him throwing in bunch of chemicals in the last 6 weeks of the season (Hmm, he mentioned he used to work for Leslie's....).
Opened pool and it was cloudy. Could see maybe 4ft down and it's a sport pool that's 6ft deep in middle.
Opening values from pool guy were:
Pool guy notes: added 4 gal LC and 1 gal acid
Pool guy notes: Added 5lbs granular chlor. 6oz Clear and Perfect. Please add 4 Gal LC between visits.
Notes: Pool was clearer but not 100%. I had hit it with 4 gal LC between visits as instructed.
Pool guy notes: Added 4 Gal LC and 8lbs soda ash
Pool is currently hazy - regressed a bit from 5/28 pool guy visit. I got frustrated and bought a lot of LC and some test strips. Realized pretty quick those strips are not accurate enough. Tonight I did some digging in pool shed and found a Taylor K-2006 test kit that previous owner left for us (Yes!).
I played around a bit today with LC and test strips and then the K-2006 kit. I won't bother with all the strip results, but after adding in 4 gal of 10% LC in AM and 4 gal 12.5% LC at lunch, and 4 gal 12.5% LC after work, the strips were still reporting low TC and FC.
Here is my first result with the K-2006 kit from 9PM tonight:
CYA <30 (I filled up to top of tube and could still faintly make out the black dot). Did the test twice to verify.
Thoughts on what to do next? Is SLAM needed since my water is only hazy? I can currently see main drain at bottom (6ft) but just barely - see picture.
Pump runs 24x7 during the season. Filter has never been backwashed (don't know how to do it). Pool guy reports filter pressure readings as "good" every week.