Hi guys,
Recently I found out that my CYA level was way too high, somewhere between 250 and 300.
Having to replace around 80% of the water, doing it in one go would be too dangerous for my old vinyl liner, and multiple drain and refills would waste a lot of water.
Searching on the forum for people in my situation, I found that the tarp method would be the best alternative. I recently purchased a black solar cover (thick bubble wrap) which is too big for my pool, so it was perfect for this.
Here is my pool before the process (I will need to SLAM it after the CYA is back to standard levels),
https://www.dropbox.com/s/doc1cmibz6d23ki/20170429_075051.jpg?raw=1
I don't have a main drain, and my vacuum cap doesn't make a good seal, so I used this pump to drain the water in the skimmer, and then set the valve on my filter to waste. It is not ideal as a lot of air was sucked in the main pump through the skimmer, but in the end the pool drained successfully.
https://www.dropbox.com/s/rh68nwg1cxanvs3/20170429_075442.jpg?raw=1
Here is the new water filling the sheet, at first I was afraid that the bubble sheet would want to float up, but it worked very well. I think it even added a little stability, keeping the sides of the sheet out of the water even when not properly maintained.
https://www.dropbox.com/s/bvwmt5px06b5x8h/20170429_080046.jpg?raw=1
https://www.dropbox.com/s/uzznjv7jughm89v/20170429_082407.jpg?raw=1
https://www.dropbox.com/s/55b7w9e8p8b5gav/20170429_092526.jpg?raw=1
here is the pool a little later, I used duct tape to maintain the two sides at the same height, but there is really no tension in them,
https://www.dropbox.com/s/ia5e2fhgn2lfrl5/20170429_141815.jpg?raw=1
And here it is at the end of day two, the tarp is full and touching the bottom, there is still a bit of old water on the sides but the tarp is too small to go much lower.
https://www.dropbox.com/s/wbua6542hwa0ihn/20170430_152614.jpg?raw=1
And then, the "grand final", the removing of the sheet :
https://www.dropbox.com/s/isa0bzgolfvjx2b/removal.mp4?raw=1
Anyway this worked very well and my CYA is now even lower than I excpected, less than 30! Oh well, it's easier to raise than to lower
I'm ready to begin the SLAM!
Recently I found out that my CYA level was way too high, somewhere between 250 and 300.
Having to replace around 80% of the water, doing it in one go would be too dangerous for my old vinyl liner, and multiple drain and refills would waste a lot of water.
Searching on the forum for people in my situation, I found that the tarp method would be the best alternative. I recently purchased a black solar cover (thick bubble wrap) which is too big for my pool, so it was perfect for this.
Here is my pool before the process (I will need to SLAM it after the CYA is back to standard levels),
https://www.dropbox.com/s/doc1cmibz6d23ki/20170429_075051.jpg?raw=1
I don't have a main drain, and my vacuum cap doesn't make a good seal, so I used this pump to drain the water in the skimmer, and then set the valve on my filter to waste. It is not ideal as a lot of air was sucked in the main pump through the skimmer, but in the end the pool drained successfully.
https://www.dropbox.com/s/rh68nwg1cxanvs3/20170429_075442.jpg?raw=1
Here is the new water filling the sheet, at first I was afraid that the bubble sheet would want to float up, but it worked very well. I think it even added a little stability, keeping the sides of the sheet out of the water even when not properly maintained.
https://www.dropbox.com/s/bvwmt5px06b5x8h/20170429_080046.jpg?raw=1
https://www.dropbox.com/s/uzznjv7jughm89v/20170429_082407.jpg?raw=1
https://www.dropbox.com/s/55b7w9e8p8b5gav/20170429_092526.jpg?raw=1
here is the pool a little later, I used duct tape to maintain the two sides at the same height, but there is really no tension in them,
https://www.dropbox.com/s/ia5e2fhgn2lfrl5/20170429_141815.jpg?raw=1
And here it is at the end of day two, the tarp is full and touching the bottom, there is still a bit of old water on the sides but the tarp is too small to go much lower.
https://www.dropbox.com/s/wbua6542hwa0ihn/20170430_152614.jpg?raw=1
And then, the "grand final", the removing of the sheet :
https://www.dropbox.com/s/isa0bzgolfvjx2b/removal.mp4?raw=1
Anyway this worked very well and my CYA is now even lower than I excpected, less than 30! Oh well, it's easier to raise than to lower
I'm ready to begin the SLAM!