Besides the CYA levels causing issues, often it's phosphates, these can be from all sorts of sources, people, hair products, washing detergent on costumes, birds etc. Keeping this level low removes the food for algae.
The finer the filtration, the more you remove from the water so less treatment required.
Just pointers towards easier management.
How much to reduce our rent for each day our pool's green?
I think that might be our problem too Teapot, levels of chlorine, CYA, pH etc all good but we're still getting patches of algae on a weekly basis. Constantly having to sling a couple of litres of liquid chlorine in to clear it. Should we get sealer or jolly gel? Why would a pool become nutrient rich? Ours was emptied and refilled a month ago.teapot wrote: Your water must be nutrient rich in algae terms. Worth checking phosphate levels and whether the filtration is good enough, maybe add some seaKlear or jolly gel.
Kathy
Waterfront location in Le Faou
"My goal in life is to become as wonderful as my dog thinks I am."
Waterfront location in Le Faou
"My goal in life is to become as wonderful as my dog thinks I am."
Yep, gets brushed every time.LotBoy47 wrote:Give the algae patches a good brushing before treating the water as some algae type form a crust on their surface which can stop the chemicals reaching the parts you need to kill.
Kathy
Waterfront location in Le Faou
"My goal in life is to become as wonderful as my dog thinks I am."
Waterfront location in Le Faou
"My goal in life is to become as wonderful as my dog thinks I am."
Yep, gets brushed every time.LotBoy47 wrote:Give the algae patches a good brushing before treating the water as some algae type form a crust on their surface which can stop the chemicals reaching the parts you need to kill.
Kathy
Waterfront location in Le Faou
"My goal in life is to become as wonderful as my dog thinks I am."
Waterfront location in Le Faou
"My goal in life is to become as wonderful as my dog thinks I am."
It shouldn't build up nutrient that quick, that said, phosphates are often added to water supplies to reduce corrosion so worth testing.KathyG wrote:I think that might be our problem too Teapot, levels of chlorine, CYA, pH etc all good but we're still getting patches of algae on a weekly basis. Constantly having to sling a couple of litres of liquid chlorine in to clear it. Should we get sealer or jolly gel? Why would a pool become nutrient rich? Ours was emptied and refilled a month ago.teapot wrote: Your water must be nutrient rich in algae terms. Worth checking phosphate levels and whether the filtration is good enough, maybe add some seaKlear or jolly gel.
To keep things nice I and many others recommend maintaining the chlorine level at 5-7.5% of the CYA stabiliser level. This provides sufficient free chlorine to deal with most issues.
Its black algae that has the tough shell and its not actually an algae, its a cyanobacteria and very resistant, usually requires chlorine dioxide treatment. Just another example of the pool industry getting it wrong.
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