Looking for a new HOB overflow

[jaxteller007]

We currently have a CPR CS90 on our 75. It's rated at like 600 GPH maximum and we have a Sicca 4.0 which i think is a minimum of 608 GPH (plus I slightly cracked our existing one). I've been told we should be using one rated anywhere from 800 to 1000 GPH so I was hoping to find a used one for sell.