Re: Sump for 55 gallon As stated above a sump/refugium should be as large as will fit under your tank.One reason is water volume the more water you have the more stable your tank will be.Second,having a large refugium will provide you with lots of free food for your tank,and if it has enough green biomass growing in it,it will remove nitrates from the tank that a protien skimmer might miss.A sump is a great place for the skimmer as well,keeping it out of sight.And if it is properly closed in it will reduce the noise volume.A 20long would be a good place to start but a 29 long would be better.In the 20 long slightly less than half the sump would be fuge.In the 29 long 2/3 would be fuge.The tank you mentioned above would be pretty much a waste of time and money. |