I would suspect your lighting is more of an issue than the watering schedule. I got the blurple lights when I switched to led and they vegged great, but I had issues with small buds. When I got some quantum boards, my buds improved 100%. Also, are you using the entire line of advanced nutrients? It helps to run some high p and k boosters early in flower to help them stack up better. But in soil with smaller pots it is pretty common to have to water them every day or 2. I run hydro, but some of my bigger plants can drink close to a gallon a day.