biocube 29g and flow

[Swooshjvm]

I have a 3 year old Koralia 2 and a nano Koralia for flow now besides return flow. The Koralia2 goes in reverse sometimes so I want to replace it but models are different now. The flow between the two now alternates with the smart wave. So the question is which of the new Koralia's should I go with? I don't mind increasing the flow a lil as well.

 

[Swooshjvm]

Actually I don't think it's a 2 maybe a smaller one

 

[Swooshjvm]

Yes it's a 1

 

[KoleTang]

Any koralia should be fine. I heard they fixed the annoying knocking noise and the reverse flow problems in the new evolutions.