How to Get Rid of YELLOW MUSTARD ALGAE in a POOL

Yellow mustard algae and I have a long relationship. I've battled with it for a few years now. I live in the New England and the stuff loves my pool. This video is very helpful and thank you. It's been 24 hours and I see a difference, but not there, yet. One comment: I rinsed out the sand filter using my garden hose for about a half hour. (Instead of backwashing) The garbage that ran out was opaque-nasty. Next time I'll backwash after rinsing out the sand to be more thorough. Overall, I'm seeing results, so a big THANK YOU.

We have Mustard algae. We have been fighting getting our pool clear all summer and finally found out why. So my question is our pool is relatively small it’s an 18ft above ground pool. Would it be better to just drain the pool and disinfect it and clean it and start over?

Ive got it in a new pool (been up for a year) but nobody has been in it at all yet. everytime i think its gone it comes right back within a couple days. ....im stumped.

So it’s chlorine resistant but the treatment is to triple shock with chlorine…. Mk

I have SO much liquid chlorine I don't want to buy several bags of Cal-Hypo to do this so can you just tell me what PPM of chlorine I need to maintain instead?

I know you said it's rare but what if you have a cartridge filter? Seems like it's too fine to catch it.

It was so satisfying weighing out 7.5 lbs of shock to kill that yellow crap! DIE ALGAE!!!

Can you come take care of our pool in Arizona???? I'm serious 😮

sodium bromide and 1 or 2 lbs of shock will get rid of yellow algae. yellow treat algicide is the best brand

I treat with yellow out add a jug of Chlorine and the same time. Then follow up the next day with another jug of chlorine. COMES BACK IN ABOUT A WEEK :( what do I need to do????

Yeah you know how much good shock cost !?!?!?

What do you do if you have an Intex style pool with a cartridge filter and no way to vacuum to waste? 😭

It ain’t rare here in Panama City, Fl.

Chlorine resistant: use bleach. Huh, that's weird

I wasn’t sure if it was yellow algae or just dirt and debris that started after a chilly week of no swimming or using the pool. But it was yellow. Although as I’d vacuum, it’d look more brown. It didn’t climb up the sides of the pool, but kept spreading on the bottom. After vacuuming and shocking it was extremely cloudy. A few days later it was less cloudy, but still too cloudy (white, foggy cloudy) to want to swim in it. Between that and cool weather it was still not being used for a few weeks. It then got yellow all over the bottom of the pool again. It’s a small above ground pool, a little over 4000 gallons. I’m recovering from chemo and dealing with lymphedema so it took me four days to vacuum it again. I just shocked it last night. It’s super cloudy again. The new filter was green after all the vacuuming, so it got rinsed out. I’m not sure whether to shock it again and then a day or two later add clarifier? After not the best swimming weather in August, it looks like it’s going to get hot and humid again in a few days - perfect swimming weather,. But I’m feeling stressed that the pool might not be swimmable in time if I can’t clear up the water. Swimming has been a huge help physically for me. Not to mention fun, which I definitely could use this year. I can’t reach under the steps though to vacuum or brush. But yet it still had stayed clean as far as no yellow or dirt on the bottom for over a week or two. But then we got some more not so great weather, and I’m not able to constantly vacuum, and the slight cloudiness got worse again and more yellow on bottom. There were some leaves and tons of tiny dead bugs this last time I vacuumed the past few days. Lots of that sort of stuff in the water. Last year was so easy to maintain, no problems at all, although I had help, and it was being used constantly, and the weather was better. Not sure what to do next to get it swimmable within the next few days, if that’s possible. I would absolutely love even just a few more days of swimming before the summer is totally gone for the year. Any suggestions?

If mustard algae is chlorine resistant as you said in the beginning, how does pumping the chlorine levels up do anything?

Yellow algae is certainly not rare lol

Can I use this method with out a pool pump?

@swimuniversity does this work for saltwater pools? Newbie here.

Funny you say algae is chlorine resistant but then thats exactly what you promote to kill on all equipment etc.

Skew balancing becuase super chorinating is going to push your PH up up up, get rid of the algae and then balance

Great video
Love watching your videos
I’ve done what you said but it looks like a huge stain
Had it before and did what you said and it helped
Now ?
Maybe needs resurfacing ?

I have a 14,000 kidney shaped marcite pool in Florida. I have to brush it at least once a week to keep the algae away. It’s relatively uniform, not splotchy, and grows on the floor and walls of the pool. It’s yellow in color. Is it mustard algae or something else?

I fight this stuff every year, but my pool is out in the middle of a conservation area right smack between 3 ponds. Evidently it’s commonly found naturally on trees around ponds. I highly recommend following these guys instructions as they have worked for me and balancing that ph and getting the right amount of chlorine seems to be key. Also you’ve gotta be prepared to waste the hell out of the water to flush it out of the system and get it out of the pool. I’m hooked directly to a well with the pool, but if you’re in town that’s gotta suck. I’ve heard there are methods at filtering it out of the water but only directly flushing it out has ever worked for me. Goodluck to anyone else fighting this crap

Soo you say it’s chlorine resistant but your solution is to shock the pool??

How long typically does it take for the yellow algae to go away?

So does mustard algae turn into a dust? Or does sand do that?

So after the shocking and killing the mustard algae, does it settle to the floor and you have to vacuum?? Or is it just gone?

What do we do if we have about 2ft of water at the bottom of our 16x30ft above ground pool, and it very clearly has mustard algae in it? We didn’t have our filter or anything plugged in yet because we are just at the beginning of the swimming season.

You're an amazing resource and person! Thank you for all the help. I recently started taking care of my pool. I always had a pool person, but my guy stopped serving my area. He was so good at what he did - a tad expensive, but because our pool was always so well maintained, we didn't mind. We hired someone new and within 3 months there are pool stains, algae, etc. The guy wanted to charge a small fortune to fix the issues. I fired him and just started figuring it out on my own. I still might hire a pool service in the future (it is a LOT of work), but I feel great I have my pool chemicals, DE filter, etc. in great shape all because of you and some helpful knowledge from local pool company, but mostly YOU!

Dealing with it as we speak

I got a tree that when rains the tree looses alot of pollen and at first i thought it was its this and the tree is the reason why the pool gets contaminated

Yellow treat…

If it’s chlorine resistant, wouldn’t cleaning your pool toys with Clorox bleach spray be ineffective?

I deal with the same drama every summer. Here we go again

I have a persistent black stuff in my pool it settles on the bottom and is very easy to brush but it keeps coming back. I don’t know what to do.

Do you vacum first? Then add shock? Or does it matter?

So after getting rid of it do I use algaecide every week to prevent it from coming back?

Yellow algae is relentless. I'm losing my mind!!!

What if I have salt water pool .. which shock should I use ?

Hi thanks for your videos! I did the triple shock you mentioned in your video but I added the shock directly to the pool, without dissolving it before. Is this a big deal? How long can I swim again after? The next morning the water is very opaque, not clear.

How do you know if you have it? I shocked the pool with algicide about a week ago because it was pretty foggy and now I seem to have this fine dust on the floor (but no longer foggy) that's not easy to vacume up. Gets a bit spotty too. It easily forms a cloud when pushing the brush over it.

Do i run my pump like normal or put it on circulate?

Is it best to brush the pool before shocking it so its all stirred up?

We just realized what we have is yellow algae. *#*% we have been shocking and putting in liquid chlorine and vacuuming to waste and brushing for weeks!! But this stuff still comes back and settles on the bottom! I just saw some videos that it is on all our stuff. Great. First of all is it hazardous to a person when they get in the pool to vacuum and brush?
Ok so after I wash down everything Do you recommend I put in Yellow Out? Or other algaecide? We are basically just trying to clear/clean the pool to get it ready to winterize it. Help!

I hate my pool that I put in 32 years ago. I take care of the pool myself and have been fighting mustard algae for the past 2 years. My plaster is 11 years old, is it still OK to use a metal algae brush on it? I bought one then I was afraid to use it so I returned it. I live in Phoenix and have lots of trees.

You need to kill the phosphates in the pool. That is food for algae. Without it, algae can’t grow.

You have to be careful shocking mustard algae. If you have some not brushed or imbedded then if you use to much shock it can bleach the algae spots and your left with bleached blots in the walls

Lost me at apron