Originally Posted by joncat24
those are the return lines form your sump which will give you either 1200 ro 1800 gph return depending on which return pump and drain hole size. IMO----You still need at least two 900 mods...
jon,
Based on your message above and this one I found... "man these things are wicked. I did 2 1200's for my 180 and I think it is too much flow.."
What would you suggest for my 180g, 2-1200mj mods or 3or4 -900mj mods?
thanks