What should I do with my 40 breeder

[Fishn28]

After moving everything from my 40b to my 75 gallon I now want to find a purpose for the 40 breeder. While I still have all the equipment to get it running again I’m not sure I want to divid the funds between the 2 tanks as I am basically restocking my 75 after some fish disease. What would you do with the extra tank?

I’m not completely out on restarting the tank though

 

[BristleWormHater]

After moving everything from my 40b to my 75 gallon I now want to find a purpose for the 40 breeder. While I still have all the equipment to get it running again I’m not sure I want to divid the funds between the 2 tanks as I am basically restocking my 75 after some fish disease. What would you do with the extra tank?

I’m not completely out on restarting the tank though

If you don't have qt tank use it for that.
External refugium for the 75G
Diy sump for the 75G
Second tank for wild caught beach critters has been a dream of mine.