We are in Northern VA, and a newly replastered pool since last summer. The first season was alright and we learned a lot about the TFP protocol and handled our water chemistry ourselves.
Had pool company to close and open for the first time. New DE filter grid installed too. Pool was under safety cover since Nov, added some algaecide and chlorine during the winter, but soon had to drain out about 2-3 inches prior to a freezing event. Water was filled back up mostly by rain and we refilled about maybe one inch back to the skimmer level.
Pool company did brushing and vacuum (not through our pump), added 3 lbs of granular chlorine and half gallon acid. CYA was below 20 so we were OK to put in four pucks in floater. They used the same Tyler testing kit recommended here. We tested the water in the evening, FC was 9.5, TA 70, CA 200, PH 7.4.
We noticed a few hours after the pool company left that there were black stuff scattered around the bottom. They are clustered in somewhere, other places more scattered, also scrubbable like regular dust.
Our temperature has been jumping past week, highest reaching 86, but lowest at 35. Next couple of days will be in 30s/50s. I guess algae probably could not survive in this temperature?
Questions for you veteran pool owners, what could be these scrubbable black stuff? I do have a main drain at deeper end floor, so do I just treat them like regular dust and use brush to push them towards main drain, then vacuum?
The water otherwise becomes very clear already.
Thanks a lot.
Had pool company to close and open for the first time. New DE filter grid installed too. Pool was under safety cover since Nov, added some algaecide and chlorine during the winter, but soon had to drain out about 2-3 inches prior to a freezing event. Water was filled back up mostly by rain and we refilled about maybe one inch back to the skimmer level.
Pool company did brushing and vacuum (not through our pump), added 3 lbs of granular chlorine and half gallon acid. CYA was below 20 so we were OK to put in four pucks in floater. They used the same Tyler testing kit recommended here. We tested the water in the evening, FC was 9.5, TA 70, CA 200, PH 7.4.
We noticed a few hours after the pool company left that there were black stuff scattered around the bottom. They are clustered in somewhere, other places more scattered, also scrubbable like regular dust.
Our temperature has been jumping past week, highest reaching 86, but lowest at 35. Next couple of days will be in 30s/50s. I guess algae probably could not survive in this temperature?
Questions for you veteran pool owners, what could be these scrubbable black stuff? I do have a main drain at deeper end floor, so do I just treat them like regular dust and use brush to push them towards main drain, then vacuum?
The water otherwise becomes very clear already.
Thanks a lot.
