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I'm having to clean my current uv/filter (a Hozelock model) every few
days. I enquired at a local supplier about a larger replacement and
was steered towards a Oase Filtoclear pressurised model.

I thought I read somewhere these were not up to much but cannot find
the reference now, anyone have one of these or any views on
pressurised filters in general?

My Cyprio Bioforce 500 plugs almost everyday during high sludge periods
(startup). There just isn't enough surface area for the foam. I think it
would have to be hugely oversized to be much good.