the more room and air flow the better. and you get better light penetration, stagnant air can lead to mold issues. if you keep them close together be sure to have good air flowIs that a bad thing that the plants are so close together....
That is the Way that the EZ cloner came. I just stuck it in the Tent. The 16 site easy cloner has the same distance between the plants...
View attachment 5387145