I just use a plastic cap of a bottle for a food dish. You might just want to do that.
yeah I'm doing that now.. i just hate how it trigger neophobia in some ants
Just noticed this. Curious, I’ve used Reynold’s Wrap foil as a feeding dish and as a base to hold my ByFormica nectar feeders for 2+ years with no issues.
You're probably using foil you had for a while, this foil was new.
How is your large colony doing? I recommend keeping the dead bodies of those queens, since in my experience with Camponotous (chromaiodes and pennslyvanicus, different species so it might not apply to you) a lot of queens will die quickly of parasitoid fly larvae.
It was 100% the foil.. i lost 20 absquatulator workers and I'm pretty sure the larvae all died, too because I'm not seeing cocoon discards.. the foil killed one of my superstitionia donensis scorpions too. died whilst drinking from aa water droplet on the foil, so it's gotta be some sort of pesticide