My solution for ants is to spray the shelving our tubs sit on with ridx (bedbug spray from walmart). I spray them twice a year as this spray also kills and controls dust mites (keeps my meal worms clean from these pests- the mites can't go from tub to tub). But this spray also kills ants and roaches (spray the shelves and wait a while before returning your tub so any spray lingering in the air doesn't drop into your tub).
This spray, by the way, is also safe for lizards. I mean I don't think I would use it on surfaces chameleons drink from, but I do use it on the floor of cages when I have ants making a line in and out when the cages are outdoors.
And as for ants not reproducing- this past year I suddenly have some kind of horrible little piss ant that does exactly that- they don't seem to need or require a permanent nest. They make a little clump of ants and carry their eggs around everwhere. This climb of eggs and ants can be in any tight space- even in the corner of aluminum caging. They have become a huge irritation for me.