I know that many lake companies add blue dye to water to reduce alge growth in lakes
Using just basic food color, do you think that it would reduce the growth of alge in a pool?

Would this reduce the sun consumption of chlorine?

Is it dangerous?

No, no, and probably not

I suppose adding dye to chlorine is a bit off the wall and the chlorine would bleach it out

Food coloring won't work. All of the common food colors will be broken down by chlorine and gone within hours (or minutes more likely).

Besides, we don't want to reduce the growth of algae, we want to totally eliminate it. If there was such a product, it might be a good thing to use when fighting algae. But for normal day to day use, chlorine works fine and you have to have chlorine anyway.

Party pool, it can stain if you use too much! Also gets filtered out rather quickly.

I don't think it's dye. I think it's copper sulfate. No algae and a really pretty turquoise color. It also stains things real good. They used to dump it in the artificial lake at an amusement park I worked at when I was a teenager. You don't want it in your pool, unless you like green hair.

No, apparently it is a "completely safe organic dye". See for example this site or this one. Those two both appear to be organic dyes that will break down in the presence of chlorine.

Ok maybe its just me but it might be fun to have a hot pink swimming pool for a day

I actually use an organic dye in my Koi ponds during the period just before I have full oxygenator vegetation growth (underwater plantlife) and surface coverage of my vegetation (lilies, etc) - it does in fact inhibit algae growth. But that is correct above, it would almost instantly be neutralized by the chlorine.

Party Pool sells red, green, and blue dye suitable for use in swimming pools. It lasts several days and then fades out.

Im going to get some of this for July 4th
It should be fun.

The red turns the pool a shade of purple.

I'm getting ready to open my pool, and I just overheard my Mother-in-law telling my wife how great the water looked last year. I might have to throw a bottle of this in before be pull the loop lock cover off.

I keep reading this thread...and every time I keep thinking of something my pool store told me just this year. I was buying a couple bags of shock...not sure which of the proteam ones I was getting, but the guy told me he really liked this shock because....

Are you ready?

It put an ever so slight blue tint to the water when it was doing its job properly....

yah, in other words once you kill all the algae and have FC levels as high as they need to be and nothing else is living in your water...it will be blue and sparkly...

And still I bought it. Then I found TFP...

If I was open in March, I'd put green dye in my pool just like the chicago river!

We don't have anyone who would buy the green or yellow, so I don't stock it. lol

A handful of the yellow would be great for practical jokes though!

If you want green water, save your money on the dye! Just let your FC go to zero for a while, it's a sure way to get green water
lol