Which Koralia and skimmer question

[Monkfish]

Which one of these do you guys recommend for a 20 gallon long?

 

Koralia Nano 240 gph 3.5 2" x 3"

Koralia 1 400 gph 3.5 2-1/4" x 5"

Koralia 2 600 gph 9 2-7/8" x 5-7/8"

Koralia 3 850 gph 10 2-7/8" x 5-7/8"

Koralia 4 1,200 gph 12 3-1/4" x 6-1/4"

 

Also do you think its necessary to have a skimmer on a 20 gallon if so does anyone know how far this model sticks out above the top of the aquarium?

 

Tunze CLICK HERE

 

Or is there a better nano skimmer than this if i even need one?

[Ryan_H]

i'm about to switch my 20H into a 20L and i'll be adding 2 koralia 2's. i like flow

[Sarsipius]

I have a koralia nano and a koralia one in my BC 29 and it is almost too much flow. almost

[Monkfish]

So a Koralia 1 is more than enough?

[do_0b]

if i were you i'd go with 1 koralia 1 and 1 koralia 2 and the tunze 9002 skimmer is a bomb skimmer

[Monkfish]

Ok thanks thats what I was looking for and do you know how far it sticks out on the top the skimmer that is?