If I remove the HOB
filter, what will serve as the mechnical filtration? I ordered 2 Maxijets 106gph PH
's. Now I'm trying to decide (with the advice given from here), if I should use 2 PH
's and no HOB
OR 1 PH
and the HOB
Also, where is the correct placement for the PH
in terms of depth? In other words, should the PH
be placed close to the water surface or well below the surface?
And what is the reason for removing the bio-wheel? To eliminate the excess nitrates?