Why do you feel you need additional water polishing? Is the water cloudy?
2217's are fairly large filters and to have two running on a 55 I think you are more than good to just use them as the filtration. Have you tried going longer on the maintenance? Once a month cleaning of the filters seems like overkill to me.
I have a heavily stocked 55 tank running one Marineland C360 and I only clean that every 3 months, my water is always clear.
2217's are fairly large filters and to have two running on a 55 I think you are more than good to just use them as the filtration. Have you tried going longer on the maintenance? Once a month cleaning of the filters seems like overkill to me.
I have a heavily stocked 55 tank running one Marineland C360 and I only clean that every 3 months, my water is always clear.