I've never truly had a measurement but my pool guy told me what he estimated it was, it is 10 ft seep at its deepest point and about 45-50 long and anywhere from 15-20 ft wideYou've got one big honkin' pool there friend! Is it truly 40k gallons?! WOW!
The Pentair IC60 might be your best bet, but I worry it too may be a bit small?? Some folks with seriously large pools find putting two SWGs to work is the answer.
The cost of using a SWG is about the same as buying chlorine....its just that you're paying the price all at once upfront. The advantages though are enormous as it will work day in and day out and allow you to leave on vacation or trips without worry about your chlorine.
Ok thanks for the advice, I'll try it again when I get home, I definitely did not use the "glance" method, I looked long and hard down the vial and sun to the front of me.Great! Can you post up a full set of test results?
FYI -- you cannot measure a CYA of 45. The vial is logarithmic. Next time, try this:
Once you have your solution ready, back to the sun, etc. Fill the vial to a line, say 80, lower the vial to your waist level and glance for the dot, you see it, add solution to the 70 line, glance, see it, repeat until you no longer see it with a glance. Then use the CYA value one step above the line you read. So if you stopped at 50, use 60 ppm CYA.
The vial is in logarithmic scale. So it is not viable to interpolate between the lines. Just use the whole numbers, such as 50, 40, 30, ....
Ok so now I regret measuring the pool lol, according to the calculator my pool is about 45k gallons.it is a very odd shape so can be a bit over estimating du to widest part of the pool is in the deep end and I kind of went with that measurement for the widthI would take a few minutes to measure your pool. You might be over-estimating it, and if so you might have a few more options for choosing a SWG.
I think a majority of pool salesmen and tech guys get the gallons wrong from stories I've read here. I know mine was off by about 5K gallons!
The bottom of the classic web version of Pool Math PoolMath has a pool size calculator on it. Check it out.