How much Aether do you get from destroying pots at tier 19?

It's dependent on your lift. GamePedia gives a formula which I translate into the following:

1. Drop the last two digits of your lift (i.e. divide by 100 and round down)
2. Add 10
3. Multiply by the number of aether pots you broke
4. Divide by 10 and round down again.

So at 8200 lift, we start with 18 aether recovered, and if you get to 9000+, you recover 20 aether.