Anyway, cherry shrimp do need a filter and a heater so they'd be fiddlier. I had some in a 25 litre once and I was doing 2-3 water changes a week to keep the water in good nick. 14 litres you'd need to be changing every day probably.
Triops live in puddles in the wild so much less fussy.
Yes, they should be fine in there. They do like live plants and live plants don't generally do well in the biorb substrate but you could get a mossball and maybe a bit of bogwood with some moss or java fern growing on it, they would love that.
Most people I know with 30 litre biorbs have given up trying to keep fish in them and switched to small shrimp and it seems to work pretty well.
I'm quite keen to be the person who "sorts out" the class pet as colleague B will keep saying daft things about goldfish and tiny tanks being ok because she "had a goldfish in a bowl and it lived for two whole years" hopefully triops will be groovy
I had a big chat with the "2 year goldfish" lady and she does know about goldfish lifespan.. the trouble is she doesn't really equate fish with "proper" pets like dogs. She is still suggesting that goldfish are lovely school pets to keep in tiny tanks etc etc
But I suspect I can win over the kids with dinosaur-shrimp-triops as a concept..
They are proper pets in the eyes of the law now, the animal welfare act 2006 covers all vertebrates. So people can't use the 'it's only a fish' defence any more! Not really teaching the children a good lesson either.
Bung in a couple of dinosaur ornaments, the triops will feel right at home