My feelings exactly.I wasn't aware that the company has newer models out.What is new about them? Actual changes? The 330/350 are good working filters and last a long time. Don’t want to compare with Aquaclear filters as I don’t want to bring back the old controversy). I like both and own several of both, good for different uses.
I don’t use the bio wheel because additional bio filtration is redundant. In tank biofiltration is occurring everywhere in the substrate and any contact surfaces as long as good oxygenated circulation is provided. The biowheel will get clogged, stuck and slow down flow circulation that is better to do without. Bio wheel is Marineland gimmick to sell product that is unnecessary.Curious as to why you do not use the bio wheels on your filters?