which filter for an 18g

[DJ_CAL]

I just upgraded my ten gallon to a 18 gallon and am going to buy a new filter, Im thinking somthing from penguin maybe the 170 but Im not sure what size to get. I have
1 java fern
1 other plant
3 red eye tetras
3 corries
1 rainbow shark

 

[aquariumfishguy]

An aquaclear 200 would be perfect IMO.