How Do I Get Rid of Yellow Algae in My Salt Water Pool?

My wife and I installed a fiberglass pool with a salt water system this year, and we’re having trouble getting rid of yellow mustard algae. We’ve used Yellow Out, which cleared most of it, but it keeps coming back in one spot on a bubbler. My wife has been trying the SLAM method, but the algae returns.

We’re also worried about using sodium bromide. Will it turn the pool into a bromide pool? Is that okay? Should we use Yellow Out again? We need help before closing the pool for the winter! Any advice would be greatly appreciated.

5 Likes

SLAM should be set to 40% of the CYA level. For example, if the CYA is 80, the SLAM needs to be at 32 ppm chlorine. Maintain this level until they pass the Overnight Chlorine Loss Test (OCLT) and the Combined Chlorine (CC) is below 0.5. After finishing SLAM, they should raise the chlorine to 60% of the CYA and hold it there for 24 hours. I had this issue when opening my pool in the spring. It took me four days and about 16 gallons of chlorine to get rid of the algae.

4 Likes

Considering I’m new at pool, I’m half asking, half telling. What about 1) algaecide and 2) phosphate remover (algae food) in this situation, though?

3 Likes

@Sadie I had the same notion. After all, the algae’s food source needs to be eliminated.

2 Likes

For six months, PoolRx will remove and prevent all algae, including mustard algae. Everyone who has tried it, including myself, says it’s the finest pool accessory money can buy.

1 Like

@Umbrielle It is simply copper sulfate. Much cheaper at Amazon

1 Like

@BreaststrokeBuff To continuously re-ionize the copper, there is also a copper pipe covered with zinc. It does function flawlessly.