Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 4 lbs.

Worked great in my pool. Took the yellow out quickly.

This actually works amazingly! Use as directed for best results! Had mustard algae that just wouldn’t go away until I used this!

Yellow out worked so well and so quickly! This is my new yearly routine.

Followed instructions on the container. It seemed to work as advertised. What I don't understand is I had high chlorine on purpose and this eats up your chlorine. Instructions are to lower your chlorine to 2-2.5 ppm, then you have to shock like crazy to get it back up to normal after (6 bags - said add 3 at 12 hours with my size pool) and recheck. Seems like I wasted another $15 in shock than if I left my chlorine high since it was going to consume it. I didn't see a number to call and ask. Yellow algae residue still dropping out for another 2 days after the treatment. I have a sand filter, cleaned in advance, new sand this May (this treatment 10/5). It does mention you may have to manually vacuum which I did not. This was a better price than the local pool store.

Excellent product

this product really works on pools that get a greenish tint with light green alge starting on the walls. I was out of town for 3 weeks and it must have rained 12 inches while I was gone. The person watching the house told me the pool was looking suspicious so I told them to dump some shock in it; I was getting back in a few days. The pool was turning green and there was some light algae on the walls that wouldn't brush off. I put 2 lbs. of Yellow Out in the pool and immediately followed it with 2 lbs. of shock. I followed it up with another lb. after 12 hours. the next day the green tint was gone as well as the algae. The pool was a little murky; it took a couple of days for the filter to clean it up; I had to backwash once during the cleanup to get it back to glass- clear.

It helped take some of the yellow algae but not much. It may do better with others but it did not work 100% for me. Followed the instructions.

I went on a vacation and my pool person had a medical emergency, no one touched the pool for 6 days. I have a huge tree over the pool, and live in AZ, temps were 110 every day. When I returned, around noon, The Pool had thousands of leaves in it, I could not see bottom, water was an iridescent green. Pretty much the nightmare I expected. But I had my secret weapon ready. I got out all the leaves I could, added 1.4 lbs of yellow out (distributed across the pools service). Let pump run at full for 5m, added 2lbs shock and went inside (trying not to look at my poor pool). By 5pm I could see the bottom, it still had a green tinge to it. I got in and got all leaves off the bottom (took over an hour). But now it was really looking better. I let pump run over night. Next morning clear water, still a little green but what a difference. I back washed about noon. Added clarifier and another pound of shock. By 5pm it was 99% perfect. I felt so much better. This stuff is like an alge eraser when used with shock. I try to always keep it on hand, just in case a problem arises.