howdy
erm you gots wholes in the bottoms of all the pots ...
the second from the left in the cup looks flooded
need realy good aeration so make loads of wholes in the bottom of cups be carefull
also as for snipping you seem to have gotten it mixed up by the sounds of it
dont clip the leaf ends off all it does is changes the look of the leaf unless you have some sort of sevire nute burn on the tips and it is slowly taking over but anywhoo
what will happen is once you start veging propperly and get loads of leaf it will make a kind of canopy of green ness looks good but unfortunatley it blocks the light from getting to the lower branches and to the smaller bud hidden under the leaf
so you clip the big leaves off from the stem in a way so that you can look at the plant from the top and make out the branches
but any plant the size you have there shouldent be clipped in anyway otherwize you will just stunt the growth
as all you have done is reduce the space that can absorb light
unlike bigger plants that will have leaf material lower down the plant beneath the leaf you take off
making any sence to anyone lol ?? i think i have confuzed myself
if you want to make your plant bushy look for fimming or topping they will help
https://www.rollitup.org/general-marijuana-growing/13820-fimming-topping-101-a.htm
hope this helps