Hi Simon,
I have a HOB filter in the water to filter out the junk. So far I only have to do WC couple times, but have to clean the filter more often. I think you will need to have a cannister filter for your setup.
Do share the contacts for american cockroach (live or frozen?), been looking for roaches to feed my bullfrogs and GTF's too.
As for the video, it seems that there are different colour variants, here is a pic of the albino's and some normal coloured ones. However, I noticed that the yellow frogs in the pic have black eyes unlike ours with reddish eyes.
Do share more tips on breeding from Mr Wan, would like to know how to make mine breed too. If possible, perhaps I could view your setup in person?