I have an in ground gunnite (plaster) pool, 18,000 gal. Until recently, it was saltwater. The circuit board that tells my chlorine generator to produce chlorine went caput, so my dear sweet husband decided that we should try Pristine Blue rather than replace the faulty part. Soon after switching to Pristine Blue, I began having a problem with persistent black algae and mustard algae as well as cloudy pool water. After several hundred dollars and a lot of chemicals, the black and green algae have almost completely covered the floor and walls of my pool. Searching the web led me to think my only option at this point was to drain the pool and give it a "chlorine bath". However, this evening after talking to a neighbor (who recommended this site), I added about 10 gallons of 6% bleach and brushed thoroughly (again). I am definitely going back to salt water, but need to know if I am doing the right thing with the bleach...my arms are starting to look like Ahhhnold with all the scrubbing! Please help, before I get a few dump trucks full of dirt....