Black Kuhli Compatability

When I originally bought my 20g long aquarium from someone who had
allowed it to get into a mucky state of deep green it came with a
handfull of sad paranoid fish. 2 zebra danios, an adult siamese algae
eater, a stunted black molly that was actually permanently *smaller*
than the danios, and something that looked sort of like a kuhli but not
quite.

The algae eater was donated to the LFS the next day - I don't know why
anyone would buy one of those things. The danios and molly lived about
six more months and eventually died peacefull deaths - though the molly
never got any bigger which I thought really strange. The kuhli OTOH has
been a wonderful addition to my aquarium. He dissappeared for about
four months when I turned the aquarium into a cichlid aquarium and I
thought for sure he had become lunch but about a month ago when I sold
all of my cichlids he reappeared as happy and active as ever.

The one disappointing thing about him is that I can't find black kuhlis
(which I recently found out is what he is) in any LFS around here. He
needs some friends. The normal variety of kuhlis are in abundance at
every store I go to but I don't know if they would be a good tankmate
or just another competitor. I'm sure they would be peacefull to
eachother I'm just not sure they would make the brown kuhli any
happier. Thoughts? Would a school of the normal striped variety of
kuhlis and my black kuhli be happy together or mostly ignore eachother?

-Daniel