Bro,
May I suggest a bunch like 50+ of silver dollars for your pond. I just recently bought 58 babies off someone and am growing them out in my 100G before throwing them into my pond. I think a small schooling fish that is not lunch for the RCK would be a great addition to your pond. It will provide a good looking contrast to the beasts.
Who's messing with the Giant Gourami, are there two of them? Maybe the other one then.
I'm sure the snakehead can hold its own in the land of the giants. It can always just bite back or jump away.
Again--your RTCs are still obese! I thought I told you to get them on a diet!
How old is that PNT, mine is around 5" and am wondering how long before it will get to plate size.