I will check my cya when I get home from work. (7 hrs)Yes, that's smart.
You don't have mustard algae, it's not common. That's just plain old algae, which SLAM can take care of...
Higher FC levels will only serve to use more chlorine and $$ for no practical effect.
But let's get a new CYA reading and make sure SLAM FC levels are good. Hang in there.