Posted: 06/07/2015 at 06:31
Fishy, watering every day is way too much unless they're in smaller pots, in full sun all day, and it's mighty hot. Few plants like wet feet and toms aren't one of them.
If the plants are in pots, you can afford to let the soil dry out between waterings. Within reason, obviously. The surface of the soil might seem dry but there can be moisture underneath where the roots are. If in doubt, stick a finger as deep into the soil as you can.
An even better test is to monitor the foliage. If it's droopy during the warmth of the day, wait till the sun goes down. If it's still droopy, water. If the foliage perks up, they're okay.
Less is better with tomatoes - water, fertiliser, everything. They're tough plants that do best with "controlled neglect".