Upgrading Help Please

[Scottyreefer]

So as much as I'd like to upgrade it's not in the budget : (
I went and bought a 21 gal rubbermade and put an overflow bulkhead in it.
I'll most likely just use it for extra water volume and dosing/top up chamber.
Gives me a 60 gallon system now though. Yay.
Going to start the buckets filling now.
Pics later