Pre-filters

[christyf5]

Its basically a more "compact" design based on the durso style pipe. This one is for overflow boxes that have a tighter fit in them. This website has photos that explain it better than I can in words

http://www.rl180reef.com/pages/stand...n_stockman.htm

[Parker]

I run a prefilter on the maxi-jet that runs my phos reactor. I have a HA problem at the moment. The prefilter keeps the reactor from clogging every couple of days. I run everything else without.