Using the BBB Method. Pool is perfectly balanced. SI = 0.0. pH 7.5 FCC 2.0. TA = 60 (infinity edge makes me keep it low). CaH = 300. Boron = 50. CC (by FAS-DPD) = 0.0. But people still complain about eyes hurting (not burning and no redness, just "discomfort"...I just think they were spoiled by salt pool!). Wife doesn't like salt pool because she is a super taster. Got to wondering if I put maybe 1000ppm salt ( below taste threshold) that it might make water more " eye comfortable". Anyone tried sub-salt cell levels of salt?