I have pygmyas cories. My tank is about 78 right now.Hmm..well I never thought about it. In the end all your shrimp would look the same, which would kind of defeat the purpose of starting with two diff types of shrimp though..
CPD's could work. Are you going to do habrosus cories? That would be a good match. Then everything in your tank would do well with a temp of about 75F.
Ah. Not good...OK..must be corydoras pygmaeus. 78 is a little warm for CPD's.
Is seriously fish a good reference? They said 68-79.I'd have to say you should do some research on it. Everthing I could find suggests they should be kept in the low 70's, and no higher than 75.