You can't water by listening to others. They don't know your situation. If its very hot and especially if its also windy you will need to water much more often. It depends a lot on what your growing in. Smart pots suck up water extremely fast. The size of the plants have a lot to do with it also. I'm outdoors in a hot and very windy area and have to water usually everyday. My in ground plants take at least 5gal per watering. Experienced growers told me its very hard to overwater in ground plants. From what I seen so far they are absolutely right. You really need to learn to read your plants. When I was starting off I would let my plants go unwatered until I started to see signs of then starting to droop, then I would water. It helped get an idea of how often to water. Be careful though you don't want to stress them to much. You have to be able to keep a close eye on them to try that. Bottom line water when your plants need it.