Coral Seas CS1012 Yellow Out 4 Lb Pool Chlorine Shock Enhancer

After use of YELLOW OUT with application instructions,. All mustard algae has been cleared. This products works very well in my pool.

worked great. i had been battling mustard algea for weeks, i bought this and followed the instructions, and i havent seen any algea in over 2 weeks now

Item worked like described.

Worked great on my yellow spots

I finally realized this is a chlorine booster. It really helped knock out the algae quickly and effectively.

Accurate and effective!!

Works great. The best product for fighting Mustard algae I have found. Will order more.

This can product worked well but is a strong chemical and recommended staying out of the pool for at least 8 hours .

Strength appears to have trailed off. It took twice as much to cause an effect, e.g. from last year.

I have done everything the label says 3 times in 3 weeks. Even vacuumed on waste. Dumping hundreds of dollars into pool. Finally put in bam which has copper. It worked for 2 days.