Prefilter is just that. Inside the overflow box, do you have any floss/matt or sponge material? Or do you just rely on the sock in your sump for mechanical?
Basiclly its going to break down to this...
For 'clean water' add as much bio material you can to your system, ie: scrubbies or lava rock or ceramic or K1 or LEGO's....
For 'clear water' mechanical is the stuff to grab the particulates, ie: pre filter in HOB overflow or sock(s) or floss mat or foam in your sump.
I run 90% bio media 14% mechanical and 1% chemical filtration in my systems, bio is mostly all scrubbies with some ceramic and bioballs etc stuff for the good bacterial to stick too. I use a combo of all mentioned mechanical stuff above. And I use Prime on occasion (chemical).
No carbon whatsoever
Basiclly its going to break down to this...
For 'clean water' add as much bio material you can to your system, ie: scrubbies or lava rock or ceramic or K1 or LEGO's....
For 'clear water' mechanical is the stuff to grab the particulates, ie: pre filter in HOB overflow or sock(s) or floss mat or foam in your sump.
I run 90% bio media 14% mechanical and 1% chemical filtration in my systems, bio is mostly all scrubbies with some ceramic and bioballs etc stuff for the good bacterial to stick too. I use a combo of all mentioned mechanical stuff above. And I use Prime on occasion (chemical).
No carbon whatsoever
