Koralia powerhead?

[Lacy]

I need a powerhead for a tank with 18 gallons of water. The tank is 24 x 22 and will have 8" of water. I am looking at the 425 and rates it for 15 - 30 gallons water. I will also be adding a sump. Going to set it up for my corals so I can redo my rock work lol and then just for extra frags. Will this be to much flow for only 8" of water? There is also the nano rated for 10 - 15 gallons, but think this might not be enough.
Will probably also look at some other powerheads, but not sure which ones.
TIA

 

[jonnyu]

Rw-4

 

[Pmj]

Rw-4

Was about to say RW-4, but it would have to be lowest setting and not pointed towards the sand (if any) at all. I love them just because the vents are much bigger, easy to clean, less likely to trap algae and gunk, and of course b/c it has a controller.

 

[G_Sanab922]

I have a RW-4 in my 30g cube. I agree with Pmj, has to be on lowest setting pointed upwards. It's small but pretty powerful. Max I can put it on mine is half way while pointed up. I think the koralia nano should be good for you.

 

[jimbo78]

The nano will be to small,

 

[nivram]

Mp10?

 

[AquamanE]

Vortech all the way.

 

[Jorge1717]

I have a 14g bio cube and I bought a vp-110 and it picks up sand, do you guys have a little trick to it?

 

[rovster]

The 240 is worthless, the 425 would be better. 2 425 would be better.