Our pool is about 8 months old... I test the Chlorine and PH levels frequently. The pool produces algae when the PH and Chlorine levels are at the "ideal" levels? The pool operates with salt and I've turned it up to produce chlorine 80% of the time... which results in higher chlorine levels, obviously, BUT... I still get algae growing on the walls and the floor of the shallow end. The pool has custom rock coping that drops into the pool (there is no tile line), could the exposed concrete grout that seals the rock coping be generating the algae? It seems to accumilate there as well in different places around the pool.
I am currently shocking the pool by moving the salt controller to "super chorinate", which is clearing the problem but once I go back to regular chlorine levels, the algae will return? ...any help or advise? ...my pool store is baffeled.