That yellowing looks like extreme overwatering rather than nute burn? I don't see the leathering on the leaves I normally associate with burn. Are you using nutes?

You mentioned you were watering once a day. That's fine. I sometimes water twice a day if needed. But how much water are you putting in? What type of soil is that? Many common potting soils are horrible sponges that drown your plant if you don't amend them. I use 8 parts potting soil to 1 part styrofoam packing peanuts by volume, and earthworms, 'cuz I'm a cheap bastard. Other folks use vericulite or perlite.

If you were using a lot of water - say, 1 to 2 cups a day in those pots - and the soil has high water retention, try letting the plant dry out for 3 to 10 days before watering again. Check soil moisture by sticking a blunt wooden toothpick or poker in from the bottom via the drainage holes. When it's dryish down there, restart watering slowly.