Make sure you have an air brake on your returns.
Drill a hole on top of the "Y" of the lockline IMO
As far as Bio filtering I am the sponge guy!
EVERYONE can waste as much money and time as they like on their filters!
THIS IS MORE THEN HALF THE FUN IMO
I have made sump/wet/dry filters for my self and a few LFS
since the 90s.
Mechanical is KING in FW
and BIO happens !
You will change water or not enjoy "keeping" to its fullest capacity IMO
There is NO NEED for all the concern on best bio media and again IMO
most are completely fooled on this issue all the time!
A healthy aquarium will need ,nor generate any more BB then it needs???
A million gallons of spinning balls ain't going make hay for a tank less then a million gallons????
My 180g has two sponges!
Make life easy for you and your fish my friend!