What is the difference between these two model lines? For example SwimClear C4030 and C4025? The seem to have identical dimensions, filtering surface and so on. Is one of them newer version of another?
The only difference that I could spot is in flow/head graphs (Cxx25 left, Cxx30 right). Looks like Cxx25 is less restrictive.

The only difference that I could spot is in flow/head graphs (Cxx25 left, Cxx30 right). Looks like Cxx25 is less restrictive.
