Pump and filters

Hi all

I'm new to group and have a few questions about pumps and filters.

I will be using a clarke hippo 2 pump (which I have used before, cheap and
cheerful) on my 6 meter high waterfall. This pump has a max flow rate of 85
L/Min. With this in mind I was looking to match the pump with a Hozelock
Bioforce 9000 UVC, however, at max rate the pump can pump about 5000 litres
per hour but I know this will be reduced as the pump is pumping 6 metres up
in the air before it reaches the filter. My question is this; does anyone
have any idea how much the flow rate will be reduced or how I could find
out? If the flow rate is halved I could use the Hozelock Bioforce 4500 UVC
instead.

What happens if you exceed the max flow rate on the Hozelock Bioforce range
of filters? Will the unit die because the pressure is too high or will it
just not filter the water as well as it should?

Does anyone have the phone or e-mail address for the Clarke (hippo) water
pump people?

Many thanks

Regards

Haymish