I have a small pond that I want to stock with either triploid or diploid trout. Can I do both? If not what do you think I should stock it with.

Look here to see if that information will help.
trout

trout 2

trout 3

trout 4

Matt I already asked this question but can you do both or maybe mix some bass or catfish in there?

Ya but wear do i find catish

I don't know maybe some pond boss professionals can help u with that one

If I recall correctly, Washington State has some very restrictive fish laws... I would check what fish are and aren't legal to stock in your state. Washington State has some very unique fisheries where the introduction of more eastern North American fish may not go so well. If CC are legal in Washington State, check with your local fish and game department and they should be able to point you in the right direction on where to get some.