I'll have to check them out. I almost went with 6 small pumps evenly spread around the tank but wondered if that was too much air, when i have the ability i want to machine my own air delivery line versus air disks/stonesSweet, sounds like you have your setup dialled in I've been using these little aquarium pumps, Rosewood Nano's, completely silent and great air flow. Just wanted to pop the recommendation out there