5.0 out of 5 stars Works well and with ease!

E.A.P. · 3 June 2025

I used this to remove the green algae that had built up on our patio, and it INSTANTLY began working creating a white film that was very easy to spray off once it had been working for roughly two hours. It brought up our patio stones to look like new! This was very good value for money, and was a powerful cleaner!

4.0 out of 5 stars Good purchase

d.f. · 7 May 2025

Removes algae and moss . Works on slabs and wood .

5.0 out of 5 stars Thumbs up from me !

M.M. · 20 April 2025

Excellent. Within hours of spraying my decking and paving slabs , the results were noticeable. The following day - no more green. It was recommended by a friend of my partner, and I was hit and miss wether it would work. No damage to my paint work either. It is a bit expensive , but I work it out at 5 litres will do me 5 years.. therefore £3 ish per year - that's a bargin. Just Spray and forget. Buy it ... You wont be disappointed. However, it wont dissolve or remove dirt, so you will still need to pressure wash, or brush/scrub general dust/dirt away. Big thumbs up ! !

5.0 out of 5 stars Finally does what it says it does

C. · 16 June 2025

Done everything it says it would. Sprayed it on anything that had green my fence some brick boards and the next day white. So come Friday nice weather I sprayed it black ducksback and went on a treat. Brilliant product not cheap but it works.

3.0 out of 5 stars Wouldn't purchase again .

M. · 20 June 2025

Did the job but left a lot of items went just black , but it did wash off

5.0 out of 5 stars Very good cleaner

A.C. · 11 April 2025

Very good pro cleaner that worked a treat. This product cleaned up the patio area very well. It's cost effective and worth the spend.

4.0 out of 5 stars Patio cleaner

J.j. · 19 March 2025

Worked well got to work on the green algae within aday

1.0 out of 5 stars Zero Effect on Algae and Moss! Cheap vinegar works better. :-)

C. · 19 January 2017

I've applied this to both algae and moss, and it works for neither.I live in a basement flat, and there is a 'well' outside my back wall, an lowered area that gets damp. The ground and walls there, as well as the stairs up into the garden were covered in green algae. I applied this product according to instructions. I waited. And waited, and waited. Nothing happened. After two weeks I concluded that nothing was going to happen. (I sprayed some cheap vinegar with a bit of salt and washing-up liquid instead - and that worked.)I also used this for my wooden raised beds which were covered in green moss. They still are covered in green moss. :-(At first, nothing happened. Then after a few weeks, some patches of moss became brown instead of green, but didn't vanish. It just looked more horrid than before, sickly brown instead of rich green. I pulled the brown (presumably dead) moss off. I could just as well have pulled the moss off while it was green, and saved myself the money.A few months after I pulled the dead brown moss off it was replaced by new green moss, so everything looked exactly as it was before I started.When I applied my home-made mixture of cheap vinegar with washing-up liquid and salt, the moss died fast. So the vinegar option is a much better choice (more effective, cheaper and almost certainly better for the environment) than this chemical.I'm re-reading the product description claims.- "Kills moss" - Apparently only some kinds of moss, because only some mossy patches were affected.- "Removes algae" - Not the algae I have.- "See results in a few days" - In a few weeks, not days, if at all.- "Lasts for months" - Not many months- "helps to control re-growth" - I didn't see much 'help' nor much 'control'(To make a vinegar moss- and algae killer, get a bottle of cheap vinegar. Bolo sells the 'Golden Swan' brand in 5 liter canisters which is what I use. Fill a spray bottle with vinegar. Add a tea spoon full of salt. Add a squirt of washing-up liquid. Close bottle, shake. Spray directly on the moss or algae you want to kill.)