Green on rocks (well above pool)

[MichaelT20]

Hi all,

First year with a new pool. The rocks on our back wall I just noticed have some green starting. Water is crystal and no problems with the chlorine levels. I’ll do an OCLT tonight but don’t expect a problem there.

The rock wall Installer (Landscaper that was hired by the pool builder, not the pool builder themselves) suggested “wet and forget”. I searched here and it seems safe around the pool.

Just confirming it’s a good course of action to spray it up there.

Any other suggestions? I could try bleach as well I guess?

 

[ajw22]

Hit it with the proper solution of Wet N Forget. I use it for mildew all around the house and pool.

Wet N Forget is longer lasting then chlorine. Areas I spray it on stay mildew free for over a year.

 

[MichaelT20]

Hit it with the proper solution of Wet N Forget. I use it for mildew all around the house and pool.

Wet N Forget is longer lasting then chlorine. Areas I spray it on stay mildew free for over a year.

Thank you! I ordered this one, since its already pre-mixed and has a sprayer

https://www.amazon.com/gp/product/B01MA6BG4U/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

 

[JoyfulNoise]

It’s an ABDAC algaecide (linear quat algaecide). It won’t harm the pool as chlorine breaks it down. Only downside is if you got a significant amount in the pool, it can cause foaming. But no big deal otherwise.

 

[wireform]

I would also run the FC hotter for a week after you spray so whatever ends up in the pool doesn't have the chance to mess with your chemistry.

 

[MichaelT20]

Awesome thank you - that makes me feel much better about spraying it nearby

 

[Mdragger88]

I Wet & forget. I buy the concentrated bottles & mix my own in the pump sprayer. Hit everything at mine & my mom’s house a couple times a year with it to treat what’s there & prevent more. Usually spring & fall. My north side moss/mildew on the peak of my house was totally gone after the 2nd application & has never returned. It used to be terrible to clean. So much easier to deal with the w&f than spraying diluted bleach everywhere (& getting it all over you) then rinsing it off or pressure washing. I have seen it do amazing things to some terrible headstones over time. If you’re careful with a light covering mist you probably won’t even get any in the pool. It’s not instant gratification, but it will lighten it pretty quickly. My brick chimney used to be black with moss - no more! I have thought about doing my top rails with it but I too was concerned with it getting in the water so it’s good to know there’s no major harm there. I will probably use a cardboard shield or something to prevent too much overspray.

 

[jesse-99]

Never heard of this product but, just bought some too! Thanks for the tips.