I installed it on my 50gal cube, its running off its own 300GPH pump, the design of this scrubber is just genius it is compact and waterproof and safe, that means if fits right into the sump and that was perfect for me since i do have limited space, i can not imagine going with any of the other bulky ones as it wouldn't fit anywhere. And its also super silent.
I tested my water here is the results.
P04: 0.12
N03: 25
I do have a GHA issue in my tank right now, so im doing a blackout at the same time hoping to kill off the GHA in the DT and hopefully starting to grow in the scrubber. Im currently running 2 light 24 hours.