i've noticed some light green stains lately in a couple of places, including seat in deep end, bottom portion of alum ladder and a bit on the shallow end steps. left a trichlor tablet on the seat for a min or so - no effect. however, these stains wipe away w/a simple swipe of a finger. i'm diligent about water chemistry (thanks to all of you), but i sometimes find it difficult to keep up w/all the leaves which fall from trees near the pool. i could also be more diligent about brushing.
PH: 7.8 (already added some MA)
water is crystal clear, no problems w/OCLT.
are these light stains anything to worry about?