Fish suggestions.

While banjo cats are interesting to look at, well an all 'round weird fish really, they don't do much.

I would steer clear of any crustaceans, they are well cunning predators no doubt. Something like a ram would make an easy kill for a crayfish. Even the dwarf crays, and the smallest of long armed shrimps are quite fierce.

Cory cats would make an excellent addition. They are cute little fish that are busy most of the day rummaging around the tank looking for little snacks. Although they do enjoy nap time. There are quite a few readily available "dwarf" species: C. habrosus, hastatus, pygaemeus, cochui are a few. Most species will be fine in your tank, but some do get fairly large. C. habrosus, panda, agassizi all stay small too.

They really add a lot of character and movement to the lower parts of a tank. Naturally occur with all your species, are completely non-aggressive, inexpensive, and hardy :thumbsup:

If your LFS has any dwarf chain loaches/ Yasuhikotakia sidthimunki.. this also make a nice addition to the community tank. I love these little guys.

lemonlime I have been told cory's don't do well with course substrate like flourite as it erodes their barbels. I had originally planned on adding a small group of sterbi cory, but decided against it because I didn't want them to loose their barbels.

As for the crustaceans, I once had a blue crayfish and he was indeed a successful predator. I learned that the hard way when he dropped down upon my 6 inch golden gourami and killed him. The funny thing was he was less than half the size of the gourami. He would even hide in my plants and try to ambush fish that got close. But from what I have read, many people have had good success keeping small crabs and crayfish in community tanks with little to no problem. I think they would make a neat addition to my all fish aquarium.

I have also been considering adding some loaches too, especially since I would like to get some MTS. I was looking at zebra loaches or Burmese loaches though, I have never heard of a dwarf chain loach. Can it eat MTS?

As for the goo-obo, that is a really neat little fish, do you know of a good information source? I think I have even seen them locally, which is a plus for me.

joe the pleco I had looked at both of the fish you have mentioned and the Royal Farowella, but again I am trying to avoid algae eaters. And although the Farowella would probably be a feasible addition, I believe the whip tail would grow to large for a twenty gallon tank.

Thanks for the suggestions and pictures so far.

Rodney I have had kuhli loaches before and I think I would rather avoid them as I am fear their constant digging would disturb my stem plants. They are a neat fish though and I may add some when I build my moonlighting.

masYPSI I would rather not add any Africans to my tank not only because of the vastly different water parameters required but also the aggression most Africans exhibit. I have been seriously thinking about setting up an African cichilid tank for my two year old son. He just loves their responsiveness and vibrant colors.

joe the pleco I am now seriously rethinking getting a royal Farowella, but I am still concerned that a twenty gallon is too small, especially for how active it apparently is. It is a really cool fish and my girlfriend agrees.

BTW those wood cats you posted are not the same as the ones I have seen. The pair at my LFS is just silver with a really tall dorsal fin.

I think I have decided for now to at least add four zebra loaches. I think they are really neat and will make a good addition to my aquarium. The dwarf chain loaches are really cool too, but I think they would be hard to obtain.

My LFS has bumble bee catfish which are neat. Has anyone had them? They look nocturnal, but I don't know. I am going to go find some info on them.

Thanks for the responses so far, it's been really helpful!