Hi,
I rent my home.
We have a pool with a new sand filter.
Good circulation.
5 working inflow pipes.
Good pump.
No flaps on the skimmer box doors.
I keep the ph and chlorine levels maintained with PH plus powder and chlorine tablets and liquid chlorine.
Even when levels are good, I’m constantly battling with a green dust that builds up on the floor. I see it one morning and by the next day it’s growing. It makes me think it’s algae but it comes even when the Chlorine levels are high. I vacuum the entire pool to waste and it’s sparking with great balance. Then 2 days later the floor is going green again. The water is clear. It’s just the floor. I brush it and it mixes into the water but I don’t think my filter can pick it up. Only vacuuming to waste seems to get rid of it. But it comes back so fast. It’s almost a full time job.
I skim the pool every day. We have trees around the pool but not much falls into it.
I’m not sure how often I should backwash but when I do, the bubble goes green and takes around 2 minutes to clear. Then I rinse.
After vacuuming to waste, when I next put the filter on, it seems like dirty water is being pumped back into the pool.
I have an old robot with a very fine micron bag. When I put the robot in, the bag is dirty but it seems to blow some of what it picks up, back into the water.
The temperature is around 30 degrees centigrade, the pool gets a lot of sun. I run my pump from 7am to 7pm, then again from 11pm to 3am.
Really, the only way to clear the dust/pollen/algae (??) is vacumm to waste. But is there a way of stopping it building up so quickly?
I went to the pool shop to ask if they have something to test CYA levels but they said no.
Thanks for all your help.
I rent my home.
We have a pool with a new sand filter.
Good circulation.
5 working inflow pipes.
Good pump.
No flaps on the skimmer box doors.
I keep the ph and chlorine levels maintained with PH plus powder and chlorine tablets and liquid chlorine.
Even when levels are good, I’m constantly battling with a green dust that builds up on the floor. I see it one morning and by the next day it’s growing. It makes me think it’s algae but it comes even when the Chlorine levels are high. I vacuum the entire pool to waste and it’s sparking with great balance. Then 2 days later the floor is going green again. The water is clear. It’s just the floor. I brush it and it mixes into the water but I don’t think my filter can pick it up. Only vacuuming to waste seems to get rid of it. But it comes back so fast. It’s almost a full time job.
I skim the pool every day. We have trees around the pool but not much falls into it.
I’m not sure how often I should backwash but when I do, the bubble goes green and takes around 2 minutes to clear. Then I rinse.
After vacuuming to waste, when I next put the filter on, it seems like dirty water is being pumped back into the pool.
I have an old robot with a very fine micron bag. When I put the robot in, the bag is dirty but it seems to blow some of what it picks up, back into the water.
The temperature is around 30 degrees centigrade, the pool gets a lot of sun. I run my pump from 7am to 7pm, then again from 11pm to 3am.
Really, the only way to clear the dust/pollen/algae (??) is vacumm to waste. But is there a way of stopping it building up so quickly?
I went to the pool shop to ask if they have something to test CYA levels but they said no.
Thanks for all your help.
What you are describing does still sound like algae. To kill and remove algae, we follow a 
