Yeah there is no way you're watering correctly. It might just be running out the side of the fabric pots where the dry side soil has separated or something. Watering too little and too often, guaranteed there's a giant hunk of bone dry soil somewhere in that pot, but at the same time you could have signs of overwatering because you're keeping the root ball constantly wet.
To answer your original question, I use organic nutes that come dry and I mix before feeding, once they are growing vigorously, usually at about a month, they get fed every other watering, unless they look like they can skip a feed. Not sure exactly how big yours are, but in veg mine routinely go 4-7 days between waterings when they are still inside (or even more when small, seedlings can go up to 10 days sometimes.) Once they are outside, I go solely by looks and not schedule, but it's usually about a once a week feed once they've exhausted thier soil.