Maths problem

My fish tank at home is having a healthy population of 30 prawns and a handful of baby prawns

The fish tank in my office is roughly 5 times smaller and its meant for just baby prawns. It has however having a population of 20 teenager prawns reaching adulthood. In fact some teens are pregnant. ---- yes i know.

So I would have to bring the little ones from home to work and bring the bigger ones from work to home. The problems are as follows

1. Its difficult to scoop out the tiny ones from the big tank
2. Its even more difficult to scoop out the big ones from the small tank
3. There has to be a safe way to transport them

I have 5 tetras and I wondered where I should put them.