Temp 29º Celsius (84°F)
salt 3,300 (Quantab salt strip)
Over the last couple of years this pool is the only one I have been having problems with. It has black algae and seems to never go
First time, after some discussions, here you all helped me with this pool a couple of years ago. Summary: apply a ultra high mega shock level (higher than what the pool calculator would suggest),
make to checks per day on the FC and pH, etc., brush, brush and brush and vacuum, etc., for around 6-7 days.
This worked very good and it lasted probably 8 months until "blackie" decided it was time to revive...
After that, as that was an "expensive and time consuming" solution (2 checks per day, etc)., we tried some products (I will name those later on here) and they worked but for shorter times..
Bottom line: what do you suggest it can be done so this black algae problem can be removed for ever?
Pictures show now the black algae coming back. On the steps, you can barely see it on the left (sorry for the picture take) and in the other one, just below the return... black spots coming back...
Do we have to remove the current finish? and then apply a new finish? We are kind of desperate for a solution that will work... Of course the only one not applicable is to RE-DO the whole pool, but other options could work.
Any help and suggestions will be much appreciated.