Tested FC this morning: 19.5
Vacuumed and Brushed the pool.
Added chlorine to get me through the day.
Removed the steps from the ladder as I will be replacing them with plastic steps.
Removed the drain cover and found some kind of a blob of rust affixed to the bottom of the drain cavity. I removed what I could and vacuumed it out. I'll try to get the rest tomorrow.
Removed the light and brushed and vacuumed the niche.
Water was crystal clear before I performed the work above:
I have some concerns though. The finish of the pool definitely shows a lack of maintenance prior to, and some during, my ownership of the house. There is calcium scaling and pitting. The scaling is green which tells me there is some kind of algae in it. The pitting also has a ting of color leading me to believe there is algae in it as well.
The scaling is not that bad and can be addressed with a pumice stone I believe. What should I do about the algae in the pitting?
Also, there is a black algae, I believe, that grows like little cotton balls:
The previous owners had a finish applied on top of the existing finish but stopped below the tile line. This black algae is most prevalent where the two finishes meet. The shock process hasn't killed this algae yet.
I'm willing to bet the overnight test is going to be fine tomorrow and I will be able to take the FC up to Mustard Algae levels which is the plan. Although, I plan on getting some pumice stone and getting rid of the scaling first. Is there anything else I can do to help resolve the problems listed above?