I just recently join the board after reading great advice I just repaired my PCB Aquarite SWG delimiter with an excellent thread !!
I have a 9 year old vinyl line in ground Foxx pool with DE & a SWG system, 28k Gal located in central NJ. The property is covered by large oak trees.
This is my first major problem so far (See attached pic) I have brown stains on the sides & floor
The stains can be removed with a brush & when removed it looks like Iím scraping sand off the liner.
Pool store states is mustard Algae. With the Salt system the water is balanced & I usualy do not add algaecide.
I did the Vitamin C test on a small & the stain removed . Instruction are to reduce the PH ad CYA & 2 bags of Burnout73
Then I should to add 43 OZ of Saltscapes Algae remover
Thoughts, comments IS this the correct diag?
Readings from a Bio guard pool store test system:
Tot CL 2.2
Free CL 1.6
Tot Alk 111
Tot Hardness 187