"Sue" wrote in message
...
They are pretty common in Europe with several manufacturers producing
them.
Mine is a Vision 350 from Juwel
http://www.aqualifeuk.com/shop/3/119/145/215/ and the smooth curve doesn't
cause visual problems. The three foot reach to the rear corner is another
matter..........
Sue

I have a 4' tank with curved class corners ('tho not a corner unit), and
yes, there is distortion at the corners, but it is not a problem really.
Everyone who sees it falls in love with it immediately. The absence of
corner posts more than compensates for the distortion. Thats my opinion and
all my visitors seem to agree most enthusiastically.