Fiji 02-28-2007 08:58 PM Flow rates for tanks hey there i would like to buy a understand / Caniter filter for both my 3 & 4 Ft Tanks. i have common goldfish in the tanks allong with some plecos/ bristlenose catty's, what are generally good flow rates should i go for for the two seperate tanks. i work with many types of pumps & have some understanding of the effect head height / pipe sizing on pump