Yes it's over watering water when it's dry about a fingers length a little shorter and pick it up before you water and after so you can tell just by picking it up if it needs water. Every four days is probably Okay if your in a three gallon to six gallon.
You can get t5 for clones and veg. You can get them at lows, home depot. I would go with hid for veg and flower with hps it takes a little longer than mh but you get a bigger yield. I don't know about led. Sorry but I'M sure one of these experts will let you know. Lol
I had 6 plants in the tent she was on the side but I'M Sureally it from me. I'M a newbie still trying new things and fucking plants up. Lol. I'll get there soon enough...
Check my journal out got 64.5 grams off a short Ryder auto with a 400Watt hps. Pictures and all in journal. I'M new so not sure if that's good I think it is so I guess that's all that matters. Lol
They haven't reached maturity yet, when you get interchangeable leafs you'll see sex. I don't know what you could do about the roots but cut and you don't want to do that. Lol. I'll let someone else help you with that... good luck