Perhaps I used the wrong term. I was thinking of using something like this. And yeah, I really prefer the sound of chorus and delay in the loop instead of in front of the amp.

I did as you suggested with the single battery powered pedal in the loop, and it seemed to get rid of the hum. I then plugged the pedal back into the original pedal chain in the FX loop and the power conditioner and lifted the ground as that video described (I put a 3 prong to 2 prong adapter in between the power supply and the power conditioner) but there was still hum when I did that. If I buy an isolation transformer, like this where would you recommend putting in in the loop? Before or after the pedals?