So far so good, but still waiting for proper tubing, since I ordered the wrong size.
The issue tubing will have to do for now. The 600 is running fine though. It's even starting to remove dust from the water that my ailing fX didn't.
I forget to state my specs:
3-silver dollars 1 being a large redhook
3-blood red parrots, 1 being about 9in., the others are about 1 1/2in.
1-pleco 2 in.
125g long with a 406 secondary filter.
I used Fluval Cycle at installation and it seems to be working well. Water tests are in the green. Unit included a LONG spray bar which is entertaining and functional.