Opening with very high ph and mustard algae

[PoolDoc]

Then, till the algae is gone, try to dose to 15 ppm (15 gallons of 6% bleach) and repeat before levels go below 5 ppm.

[greenwich3]

First of all thanks for all your advice

Was away for 5 days and had to do what I could before I left.

FC and CC need major dose when sun goes down

ph 7.4
TA 50ppm
CH 130ppm

CYA - The black dot does not disappear even after I filled the tube to the top.

Thanks!