I’m always in favor of more water volume
And I would get another 57w UV and run them in series
I think I ren them on an eheim 1000gph in and out of my sump
I had a store...
I had a fire...
I’ve had a 300 with 13 year old fish...dead
Keep on keeping on
I have 20+ year old fish and many many over 15
It’s the only thing I do by choice
The fish don’t choose to be confined to a box