what medium are you growing in? if you're in soil, you want to water pretty heavy, then leave them alone till the pots start to get light, you should be able to stick your index finger into the soil up to the second knuckle and feel NO moisture before you water again. feed once, water with ph'ed water twice is a good rule of thumb for soil.
if you're in coco, it's a whole different game, and you want to water every day with nutrient solution, and get about 10% run off each time, to prevent depleted salts from building up.