The filtration is just extra. I have a 70gal sump on a 200 gal tank cycling about 7 times an hour.
I know NTTs are supposed to be fragile, but that's when they're young. Didn't know about big like that one. I had it for 3 years.
The RTG died of shock when we moved house. It freaked out when the removal guys came and shifted all the furniture. It start losing slim coat and panting then 5 hours later it was dead!! Like i say if i'm guessing i think it ate a stone, or a bit of fish bone got stuck and damaged its guts. It couldn't swim and its belly was floating up, so it was probably full of gas. Not nice for the last 30 minutes. It was going mental, jumping out the water and swimming erratically upside down.