flow rates

[gavinsepanik]

For my new 20L dt with a 20L sump with a return pump running about 300gph should I go with one hydor koralia facing the return or should I go with 2 hydor koralia 425's on a smart wave on opposite sides of the tank?

 

[reefwars]

For my new 20L dt with a 20L sump with a return pump running about 300gph should I go with one hydor koralia facing the return or should I go with 2 hydor koralia 425's on a smart wave on opposite sides of the tank?

2 smaller directional power heads IMO are almost always going to be better than one larger directional power head

Hth