How compatible are these fish?

VincentK said:

I've got a 20 gallon with 5 Beckford Pencilfish, around 10 pygmy cories, 3 otos, a pygmy gourami, a Pseudomugil something, a scarlet badis, and a bunch of RCS. I'm planning on moving the scarlet badis to a 2.5 gallon in a month or whenever it gets cycled. I just added the Pencilfish and badis and want to know how well this will work. Also, is this overstocked?

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you will need to be more specific with the Pseudomugil something. There are several fish in that Genus. I have no other experience with the pencilfish or the cories. Oto's should be fine, the gourami and the badis might come into conflict as they have a similar body shape. The RCS should be established before any other fish are added, and be placed in a very heavily planted tank for any chance of baby survival.

Badis and gouramis will definately hunt baby shrimps. And might go after adults as well.

Vesh said:

Badis and gouramis will definately hunt baby shrimps. And might go after adults as well.

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I definitely second that. I use to have gouramis that ate my live shrimp...my gouramis were on the big side though. But as long as they're gouramis I would be wary since they are all hungry predators at heart.

My dwarf Gourami leaves my cherrys alone, exept to steal the food from them lol. The rainbow you posted a picture of looks like this one.

http://www.seriouslyfish.com/profile.php?genus=Pseudomugil&species=gertrudae&id=223

They do better of a group of 6 or more, so bringing up the count on them will be more beneficial to the aquarium as a whole. Some fish get extra aggressive if the numbers are not high enough. I do not have any experience with this particular fish though.