i picked up an ehiem ecco 2236 canister filter for my 110 gallon feesh tank yesterday. its arranged as so... from bottom to top its a coarse filter pad, many, many layers of their bio media (substrat pro), a fine filter, and a carbon pad.
for the moment up top i have a HOB filter, its a hugemungous tetra bio bag filter. i dumped the carbon out of both filter bags and filled them with substrat pro as well. now, a buddy of mine gave me an older hydor canister filter, rated for 65 gallons, and im going to swap that in for the tetra bio bag filter.
my question is, should for the second filter i set it up with the media just like the ehiem? maybe pure filter media? pure bio media? im just curious if there is a rule of thumb for dual filter setups.
and should i do both intakes on the same side, and both discharges on the other? 1 and 1?