I like ideas like´s this one, I had some very similiar too, but it was when I was 8 years old
Now I have enough knownledge that things like this won´t function
1. Aphids aren´t very good to be kept in home, I tasted it few times and I think other keepers did themeself too. Aphids don´t feed at your plants, and if yes- also- ants like´s Pheidole and honeywatter? Show me Myrmicinae beside of Myrmica rubra and others of Myrmica genus, which normal visites plants with aphids

I will taste to keep aphids again this evening, because on our plants at home they was and now I have about 50 fundatrixies(somethink like ,,mother of mothers of Aphids"

:D, or somethink like queen of the aphids.... first Aphid which will make aphid culture on a plant) and I will catch some and make set- up with a part of a plant in the test- tube......
2. P. pallidula in their mother habitat eats just died insects and things which ants find on a path, because their nests are usually between the path and some building.... They eat JUST died insects, I saw it.....
I´m, like an ant keeper, interested to primitve ants like´s Ponera, Hypoponera, Myrmecina..... I keep these ants and studing them.... One think which is very exciting on this keeping is, that these ants are living underground in humus soil..... Here are many other animals- springtails Collembola, white worms Enchytraea, Acarina animals and others... These small insects and invertebrates are living in soil, normal soil in your garden or in a forest! These animals are food for ants like´s Ponera. So Ponera is predating for these animals, somewhere on 25cms area in their own habitat! This is better choice to do! Your own microhabitate. For these you need some soil with these invertebrates, some old mixed wood, old leafs and humus.... Put it into Petriho bowl, add Ponera or other animals for watching and you have your small but function ecosysteme!
First think is to find and learn somethink about soil underground invertebrates....
This is all.... I prey you just good luck with your experiments..... But the choice of soil ecosysteme is easier and better
Bye and sorry from my bad english and metaphysics
