Welcome! Very thorough signature, much appreciated.

Now that you confirmed you have algae, I'd like to point you towards our
SLAM Process page if you haven't seen it already. There you will find how we recommend killing and removing algae once and for all. The key is maintaining the proper FC to CYA ratio (with liquid chlorine) as noted on the
FC/CYA Levels. Look at the SLAM tab. Keep in mind you'll need to test your own water at frequent intervals to "maintain" that elevated FC level. We recommend either a TF-100 or Taylor K-2006C test kit. If you have any questions about the
SLAM Process instructions let us know. We'll be happy to coach you through it.
Enjoy the forum.