Was hoping to limp through the summer with my water as is, but sadly my numbers before were pretty bad. I replaced approximately 60% of the water in my pool. Now I'm refilled, dumped DE into the filter, and I'm watching the water.
New test results, assuming I'm doing the tests right:
FC 7.5 (raising to 10)
The good news is that the water is clear. I can easily see 8' down to the drain. The bad news is that the water has a bit of a green tint. Fortunately it's largely overcast today- I'm keeping an eye on the water. The water has cleared up a bit (less green tint) over the last hour, so we'll see what happens. I'm anticipating a SLAM coming here pretty quick- going to take 11 gallons to raise me to 35 PPM at a CYA of 90. Given the green tint I would expect CC to be greater than 0, but I'll just have to test again later this afternoon.
I estimated that my CYA prior to the water replacement was 120, but sadly that couldn't be the case the CYA today. I didn't attempt to dilute the pool water to better estimate the CYA pre-water swap, but oh well. I suppose I wish I would have drained just a little more water out of the pool, but oh well. I'm not going to do another water replacement, so we'll just see how it goes this summer with a CYA of 90.
Stenner pump is in hand and almost ready to install. It will probably be this weekend before I get it up and running, but that's probably a good thing- I'll be able to learn the chlorine usage over the next week.
Pool is a 35K gallon in ground gunite/plaster pool & spa with a 48 sq ft DE filter.