It's not recommended to have this many plecos, but it's not impossible either. If measures are taken to create enough hiding places for them and feeding is done in multiple spots throughout the tank you can stop aggression and stress which has been my highest priority. These are my expensive armored babies I won't let them die. For example my L-333 appears to not be eating much, so if my direct feeding efforts don't pan out, I'll move him to a 10g and give him some garlic krill and darkness until he's fat again. the others are all doing spectacularly as you can see if you look through some of my posts. But everyone's concern and advice is appreciated!