My plants stuck at start. Here's no reason but just stop growing after start.

Ignore Buff716, he clearly doesn't know about hydroponics.

First of all why are you growing in straight up perlite ?!!!!!!!???? Go find some coco and some peat moss and mix that together with that bucket full of perlite .... even a ratio of 33% of each would 100 percent bennifit you currently ..... your soilless lol soil can not hold any nutrients or any microbes to feed the roots your plant will never grow in that hands down .......I use bio365 bioall (yellowbag) it's wonderfull and sold local to me but really add the coco and peat dude your lady is not happy any further questions dm me