Hello there, thank you for responding!

I'm putting the bull frog for sale/trade for other whites frogs, as I've already got too many cages in my room (8 rats per example...).

Azure is still hiding, haven't heard from him at all today. Checked all rat cages, no dead frogs nor any sign he's been near them.
I sorted out the tank today by using air dry clay to seal the holes where the wire for their water fountain comes out of. Sealed up the lid with black tape at one side, then using weights at the other, so they definatly wont get out.

I figured they might not keep trying to break out if they like their habitat, so I added lots of live plants today and placed spagnum(?) moss around on top of the soil. The bull frog is currently hiding under it.

I'll keep you updated on Azure's where abouts (: thanks