Good decision to order the kit. You won't be sorry.

Yes, after you clean this up, you'll need to keep your chlorine between 5-10ppm. Chlorine levels are based on CYA levels. Did you look at the Best Guess Chlorine chart? It is no more irritating to swim with cl of 10ppm and CYA of 60 than it is to swim in 3ppm cl and no CYA. If you don't keep the cl between 5-10, you're gonna have algae over and over.

And, you're welcome! We're glad to be able to help!