Choosing between a Koralia 4 and a Nanostream 6045

[SeaHorse_Fanatic]

I have used all four (Nano, HK4, 1600 mod, 2500 mod and for a 4' long tank, I would recommend the HK4 if you don't already have spare Maxijet1200s especially. They are great bang for the buck pumps if you want high flow with magnet holders. With the Maxijet mods, the 2500gph ones would probably be too much flow for your size tank. They are great on a 6' long tank though. With the 1600g mods, by the time you add the cost of magnets and a Maxijet, it will cost more than the HK4.