If not...
That system is and will forever be infected with aiptasia
Once in the system...always in the system.
That system is small
The wise move is to frag all corals, and do NOT put anything from the tainted system into the new clean system without sterilization.
But that’s just me...
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