In ponds, you should make sure that the GH value of the water is 12, at a minimum, and also make sure there’s enough bottom substrate. Having water lilies and other plants that float on the water can help with the problem too. Green hair algae

The right side of the drive was sprayed with Algon patio cleaner and the left side was not. You can see the results after 5 days and the right side looks a lot cleaner

Other suggestions from Mrs Hinch fans included using Patio Magic, white vinegar, Jeyes Fluid, Wet and Forget and bleach.

This product works by removing phosphate from the water, a nutrient on which algae thrive. It does this very effectively, and you will see a difference in the clarity of the water, but as you are removing nutrients from the water, you really need to keep monitoring the conditions in your tank during this process.Named after its appearance, which resembles strands or clumps of wet hair, GHA is not toxic or particularly dangerous but it will use the oxygen in the water when you switch off the lights, and this can cause problems in a few different ways. Price: This product offers excellent value for money with a concentrated formula that can cover a large surface area. TheUltima-Plus XP Moss, Mould & Algae Killer is cheaper than most of the other products featured in my review, yet it is certainly one of the best patio cleaners I have seen for cleaning green mould and algae. I like that it’s is biodegradable, non-caustic and therefore safe to use all around. Pets and children can be let loose onto treated areas once the floor is dry, which on a summers day would be within an hour. This slow method of killing off mould and algae is simple and attainable. This patio cleaner is not acidic or caustic. With no traces of bleach, you don’t have to breathe in toxic fumes or worry about the environment and wildlife. This cleaner is biodegradable and has a PH of 7 which is stable enough not to harm your skin or the patio surface. Watching garden visitors for just one hour in the Big Garden Birdwatch 2023 could help provide vital data to protect birds from the effects of climate change