Yeah, actually I do love seafood Tony, but lots of people don't.
The cool thing is all you use for scenting is the water, so guess what kind of sandwich I'm having for lunch today..

A couple more candoia ate during the night, however it didn't work for some stubborn corns I have on the pump. They will likely need to be hibernated.
I suspect the Tuna thing only works for snakes that might normally eat aquatic prey, namely amphibians. This certainly is the link with it being effective for both Hognose snakes and Candoia. Candoia are known frog eaters and Hogs eat toads.
Trev, ATB's can be a real pain to get going. I had a bunch once and found "slap feeding" was effective with some of them.
In near darkness try slapping them in the face with a pinky hanging from tongs. Somtimes this promotes a strike then constriction, and if you're lucky, ingestion.. Somtimes they will just kill it and drop it.. so you need to try all over again.
Aren't baby snakes fun!!LOL
At least I'm not alone now.. Trev I'm impressed you got Conicus sandboas eating dead with no substrate covering them..., but then they came from a good blood line..