They are fine together and I respect your research into compatibility.Bristlenose are great fish both functionally and ornamentally.A couple of pointers.Bristlenose are consummate vegetarians,though they will eat pretty much anything.I would wait until you have some good algae growth in the tank.Even then,as they will clean most diatom and flat algae overnight,I would for the life of the fish feed them fresh veggies.The best thing in my experience is raw green zucchini.I cut the zuccs in half longways,then each half into 3-5 inch sections depending on the size of the fish.Alot of sources say to blanche in boiling water but I just give it a good rinse in hot from the tap.Then,rubber band it to a rock to keep it down.My fave way to anchor it is by taking a small section of the plastic black strip that comes with glass tops and then silicone a rock to one side.You can rubber band the zuccs to the plastic like a little tray.I feed this every other day.90% of death in plecos and ancistrus is from starvation due to the fact they dont normally compete for food,and their nocturnal nature.They dont usually show any signs of starvation.You cant beat a better "maintenance" fish for cleaning algae off plants than a bristlenose,though they may eat softer leave species like some stem plants and the latter.Also,for ancistrus sp.,put driftwood in their tanks to rasp on as an enzyme in it aids their digestion and is an important part of their diet.Good luck...