I have had a pool for a little over a year now. Been using liquid bleach since I started and have had no trouble. I noticed this week that I have a few spots on the bottom of the pool at least one is a stain I believe from a penny or some other metal object thrown in the pool. Others in the deep end look to have a green tint.
I have also noticed every time I brush there is a brownish cloud, especially in the shallow end and on the tanning ledge. This has been going on since I got the pool.
I have only had to shock it once last spring due to a storm that blew a couple of trees worth of pollen into the pool. Outside of that, the numbers have been stable. I just tested this evening and the chlorine looks fine:
Any ideas would be appreciated. I am looking to do the over night test tonight, but do not expect to see a loss as the numbers have been very stable and predictable. The water is crystal clear. Temps have been rising and water is at about 80 degrees.