I guess you mean me, since I don't see any other pics except for the close-up? lol. My tank is so bare of plants still, I'm not comfortable showing full tank shots yet ; )
I never heard of the Koralias until I started following sewingalot's thread on Hamburg Mattenfilters (I had never heard of them, before, either). The 425 size was recommended to me for my tank because the rate of flow needs to be just so (and low) for the Poret foam to do it's thing. Now I am so addicted to the 425 that I ordered 5 more on Black Friday to use in other tanks. I think they are great...often the smaller fish - the Harlequins, Black Neons - will hover inches from one pump and swim facing the flow. On the other end, the Buenos Aires tetras will do the same. They seem to enjoy the flow and it's not too strong for them.