That's even stranger! I thought geophagus were pairing!! I have 6 Geophagus 'Tapajos Orange Head' in my largest tank, but they're not old enough to breed yet. They're a very social cichlid, but I always thought they were pairing cichlids. Are you sure it's not the other way around?
Also, I answered my own question about the bubble counter. I saw that green leaf aquariums has inline bubble counters, so I'll be getting one of those.