Landlord wants my tank out!

[kien]

Originally Posted by mrhasan

I will obviously make sure that I have a tank to accompany me. If required, I will bring the new landlord to show the tank so there's so misunderstanding.

This is a good idea. Even if your current landlord was Ok with your 20g, it would have been prudent to mention your upgrade plans. You did add a sump and a bit more complexity to your system. As a non-hobbyist the setup, however simple you might think it is can appear overwhelming.