As each inch is about 460 gallons, you are losing a LOT of water!--90-130 gallons per HOUR! Or 1.5 to 2.3 gallons per minute! Serious leak(s) somewhere.
Do you lose water when you are NOT running the pool? Search for wet areas around the pool...soggy ground, etc. Is there wetness near the pump and filter?
Can you turn off certain lines, like the low drain(s) or skimmer, isolating them and seeing if the leak stops?
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