Hydro Koralia 4.... how good are they ?

[stevea6221]

i ve got 2 koralia 3s in my reef tank and i find they do a really good job,are quiet and like said above the magnet is really handy, i had them in a 5' tank until recently and didnt find the flow overkill but then reef tanks need more flow) and they are directional anyway they are now in a corner tank and am using them both and the flow is still good not too strong but one is buried in among the live rock to kill off deadspots so i would def recommend them

 

[koop171]

ok so i am NOT going with the 4s then i think that is a deffinite i don't want to kill my filters.