Ok, I've been filling my pool with water daily for a couple few weeks now, and finally realized this excessive heat isn't the issue (yea it took me a while to come to grips with this).
I've been trying to ID exactly where my issue is, and did the bucket test to confirm. When my pump is on I lose almost nothing except evaporation. When it is off I lost a little over an inch more in the pool vs bucket just in 12hrs overnight, so by all accounts suction side leak. I did have the main off at the equipment though. Both the suction and return were closed off.
The reason I think its main vs either skim line (2 main, 2 skim) is because I can use my skim as either a return or a suction based on 2 separate Jandy 3-ways. When I use the main as a return, I get air bubbles coming up through the pool. When I use just the main as suction (both skim off) I get a decent amount of air in the clear filter lid and pressure is about 14PSI. When I use just the skim as suction (main off) I get almost no air and the pressure is a shade under 18PSI. If I use both together the PSI goes to 18 and the air is still minimal so Im guessing all together makeup for the main issue there.
I've also dove in and around the pool with the dye test and didn't notice any significant draw of dye around either skim, any returns or floor/wall plugs. I did do dye around the main drain and didn't notice anything either but the cover was still on, so most likely will have to repeat today. Even once I do that, I was going to repeat bucket test by plugging the main drains and confirm since isolating off at the equipment but not plugging it could still leak Ive heard.
My sump in the basement has been running a lot too which is very near the pool equip and pool itself
If my assumptions above are correct and I do isolate are these my options?:
1 - Hire a leak pro and pay to detect exactly where and fix or at least just isolate (cost not sure)
2 - Start digging myself and try to locate hoping its close to equip and not under concrete or deck
3- Try the liquid fix a leak (is this stuff any good and does it work/even worth a shot?)
4 - keep main plugged and not in use and wait until more time/money to investigate
Am I missing anything? On the right track? Option 3/4 would obv be the cheapest from a cost and time/labor standpoint but don't want to ruin anything. Also If I do plug and leak stops (saves my water bill)