New fish--Kribensis and Green Terror--problems?

I just bought a kribensis and a green terror (the green terror is bigger by 1.5 times) and just got them in my tank. (I am HOPING them problem is hunger.)

They both were hungry, I fed the frozen blood worms which they devoured. The G.T. was catching the top ones, and the SMALLER Krib started going up and biting/putting his mouth on him!!!! (If there were problems I expected it to be the other way.)

They're both still juveniles and in a 30 gallon. Any thoughts on their compatibility? The only problem seemed to be over food, so I am hoping if they were just really hungry, this is why the spat...

Side-note, the whole reason I bought a GT is I have a leoporinus (whom I adore) who requires more “spunky” tank mates. (aka Jack Dempsies/red devils, etc.)

As for size of tank, not to worry, I know it’s too small once they’re full grown but a) I am moving (and will upgrade) and B, the GT has been in isolation in a 20 gallon tank for 5 months. Not for picking on other ironically, but the GT in with some much smaller bala sharks and had to be moved NOT because he was bad, but because the GT was being "picked on”!!!! The fact my half-pint (though spunky) krib is terrorizing him speaks volumes. I came home tonight after a couple hours and my GT has some nips out of his tail, but the krib is fine.

My concern, will GT pony up and stop letting himself be picked on? Is that normal for a krib to terrorize a GT? Basically I want all of my fish on equal footing and as harmonious as possible, and I am worried about the GT’s ability to stabilize the power balance. (I know, I know, he should be the terror, but I have “Ferdinand” the Green Terror---like the bull!)