getting ready for tarp method

[jmikeb]

i finally have some time to start the water change. i’ve chosen the tarp method since my 11k gallon IG FB pool has a cya around 300. currently the water looks perfect and the fc has been kept in the low 20’s.

here’s my plan. i will use my little giant 1700 gph cover pump on the bottom of my 4’ deep pool. i’ll hook up a 100’ garden hose to run downhill from the pool. in order to get some sort of measurement of discharge rate, i’m will fill a five gallon bucket and time it. i will also fill and time a bucket from my supply, which is a 600’ garden hose coming from my neighbors house. hopefully i can “match” the input to the output to be reasonably close.

i have a 30x50 tarp to cover the pool.

during the fill i would like to treat the water with chlorine .... i was thinking one 3” puck, since i’ll need some cya to keep the chlorine from cooking off.

i’d like to have some comments on this please... thanks in advance

mike

 

[duraleigh]

Those run lengths for both hoses are VERY long and will make for a slow process indeed. The water will siphon quite slowly because of the resistance traveling through that much hose and your fill water will suffer the same affect.

It is certainly worth a try but you may only get a couple gallons per minute.

Putting a puck or two in the refill side is not a bad idea but a little clorox after several hours of transfer would be my choice. Then add CYA back separately or don't completely drain.....leave roughly 1/5 of your current pool water in the pool...........thereby getting your CYA roughly in the 50 ppm range.

 

[jmikeb]

thanks for the reply... odd enough i’ve got the output and input both at 5 gpm. i started about two hours ago and have 35 hrs to go. btw, a 30x50 tarp is HUGE

 

[duraleigh]

That is much better outflow than I would've guessed. Your remaining time seems to indicate you are draining the whole pool.....is that correct?

30x50 tarp is, indeed, a MAMBO JAMBO

 

[jmikeb]

yes on draining the whole thing. i think my cya number has a big margin of error since i used 1 part pool water with 3 parts tap water.