And I see him eat regular fish food as well. ( I spend a lot of time observing my tank as the behavior fascinates me). Little minds and all 
If there is something wrong with him well then so be it. He is healthy happy and keeps everyone else happy.
I also saw him clean the Sids before. They rolled over on their sides and he cleaned them up, when he was done they move on and the next one rolled over.
Some time I will send a pic of my "freak" SAE, but Shari saw him and said thats what he was. (The fish store told me it was a flying fox.)
Anyway, I will not put one in the 20 gal. I will look for an oto.
I do have one more issue
...... The 30 tank is in my living room-Lots of action, me always looking in, 3 large dogs barking, traffic area etc.The dwarf gourami is very social, like my bettas. Comes to the tank when I come over I can darn near hand feed him, very active, eats like a pig, gets along well with the other fish except the pearl, happy to be alive and swimming not frantic.
On the other hand, the pearl is very shy, hides a lot I don't see a whole lot of him. I have a large group of java moss in there and he spends a lot of time in there. Due to my observations, he is NOT picked on by the dwarf, in fact, it is the other way around. The pearl is the fin nipper. The pearl will come to the top to get fed but is not thrilled with the amount of time my big face spends looking in. He does get along with the other fish or rather he just ignores them. Long story even longer...That is why I was going to put the pearl into the 20 gal which is in the very peaceful spare bedroom.
More suggestions?