really depends on what type filtration you are looking for. The AC110 are far supieor in mechanical filtration, I have two on my 180g that I rinse the sponges weekly, water is very clear.
Emp 400s are far superior in biological filtration. I ran my 85g discus tank with just 1 emp 400 with no media, just biowheels it had pristine water params.
For your 55g I would recommend the Emp400 they are better suited for the smaller tank.
Emp 400s are far superior in biological filtration. I ran my 85g discus tank with just 1 emp 400 with no media, just biowheels it had pristine water params.
For your 55g I would recommend the Emp400 they are better suited for the smaller tank.