Your problems are two-fold and obvious:
1) You need to raise your FC level to shock level, which, if I remember correctly is 20ppm, and KEEP IT THERE for several days. You have an algae bloom on the way. After that, IF you can establish that your SWCG is working you'll need to set it so your FC stays above 3.5ppm (if you have a CYA of 60-70). You are not keeping enough chlorine in your pool in relation to your CYA level to keep algae at bay and keep your water sanitary. IF it turns out your SWCG isn't functioning correctly, then you must MANUALLY maintain your FC in the 5-10ppm range--both are after shocking to kill everything.

2) You keep listening to the pool store and pool companies who are trying to sell you stuff, and, because you won't are pushing for drastic major action: "Oh, if you don't buy our special super-duper phosphate remover your only alternative is to drain and refill your pool!" NONSENSE! Your eyes and pinkeye aren't due to phosphates, they are due to insufficient chlorine unable to kill all the nasty stuff in your water it needs to kill. Your water is UNSANITARY. I, my fellow mods, our deeply experienced senior members, and our founder ALL told you what you need to do. You haven't done it.

It's just that simple. You need to add enough chlorine NOW to get the FC to 20ppm and you need to keep it there for several days.

And it is simple. Pool care is simple but pool companies and pool stores make their living out of keeping it complex. Fear trumps hope.

Carl