What size should I get for my 75 gallon?

[Ajno]

I'm thinking of setting up my first sump for my 75 gallon. What size tank should I use. i was thinking 20l or a 29 gallon. Any ideas would be helpful

 

[rustyspurs]

a 1/4 of your tank size is usual, but the bigger the better.

 

[Racersk]

Bigger the better, but if you don't have the room, plan on getting better media for your sump...IMO

Scrubbies are great, but you need a lot of them, smaller sumps would probably be better off using Secham's pond matrix or lots of ceramic rings. Just my $.02.