How to clean algae or mould from white marble pool tiles?

[upperadvisor]

 

Since the weather has been cold and wet, I’ve got patches of white marble pool tiles with green algae or mould or something on them. The tiles are sealed. 

Any ideas what I can use or do to get it off?

[JacobZ]

Hi @upperadvisor,

I'd suggest using an outdoor cleaner such as this 30 Seconds 5L Outdoor Cleaner Concentrate to clean your pool tiles.

As this is a mild bleaching agent, you should apply it to an inconspicuous area to test it before wider use. 

If you are happy to proceed, mix the concentrate as per the instructions on the bottle, spray it over the surface and allow it to sit for ten minutes. After the ten minutes, agitate with a stiff bristled broom, and then wash it down with clean water.

Let me know what you think and if you have further questions, please don't hesitate to reach out.

Jacob