I still consider myself a newbie here. This is my second season with a pool, but the first time we've opened it by ourselves.
Before you read any further, rest assured NOBODY is swimming in the water described below. Too cold anyway. And I definitely won't let anyone in until the FC is down to acceptable levels.
In ground pool with SWG. Closing went off without a hitch last fall. Brought my chlorine level up and drained to about a foot below the return jets. Even got some non-metal algaecide in before installing the cover.
When I pulled the cover off this past weekend, I was a little shocked, but not too bad. There was a light coat of algae on one of the top steps where it had been sitting mainly in rain water. Also, there was a little algae in the skimmer basket.
Where I think I made the mistake is treating while filling, before running any tests. I based some of my treatment on the presence of that algae, and the fact that I was filling with new well water (about half the volume of the pool), and the fact that the starting water level was several inches higher than I remembered at closing (rain and snow over the winter).
As I was filling, I used 2 small 96 ounce jugs of bleach on the steps and the skimmer basket to kill the visible algae.
I also added 2 1-lb packages of trichlor (I figured I was OK with the extra CYA as I was adding a large volume of well water and will need to re-balance my CYA anyway).
The kicker, was using my SWG's "SuperChlor" cycle. This runs my pump with my SWG at 100% for 24 hours. When I got home from work last night, I knew I had some vacuuming to do, as our mesh cover allows some fine dirt through. So I had a good deal of clean up to do on the pool floor.
I'd completely forgotten how efficient my new SWG is. I took just a FC/CC reading prior to vacuuming. To my surprise, I was at:
FC - 33.5
CC - 0.5
The good news is my water was crystal clear except for the fine dirt I needed to pick up. Which is gone.
I ran my pump/SWG from noon to 4p today (hottest part of the day) with the SWG at 50% output, hoping the small runtime and reduced output would allow my FC to start dropping. Unfortunately, the reading I just took is:
FC - 34
CC - 0.5
I'm trying to figure the best way to get my FC down without just shutting everything down for a few days. I still want to run the pump at least 4 hrs a day to turn the water over and keep a handle on debris.
I just set it to continue to run 12-4 but with my SWG output at 25%. Or should I just turn the SWG down to 0-5% for a couple of days and just test daily until it gets in the range I want it, then start walking it back up a few % at a time until I am maintaining?
I am fine with the fact that I seemed to have started off the year with the algae under control. I just want to get my FC down before it harms any of my equipment.