Hi,

Has anyone ever seen this or has a comment about it?

http://www.collinsfibreglass.co.za/koi_pond_filtration.html

i personnaly do not like pressure filter systems, i do not like the idea of closed dark anaerobic areas in my flter system.

I prefer open gravity fed all the way to the end where water is then returned by pump.

but, yes, it does look interesting

Any comments on these products as well:

http://koiproducts.co.za/product.htm

Hi,

Regarding the Collins System:

It is a normal set-up for a sand filter system, but in this case I would change the following:
“Bigger Sand” 3-5mm silica sand.
Modify the sand filter “fingers” to accommodate the 3-5 mm sand and always go for twice the size of the “Sealed Bio filter.”
Always run this form of system 24/7 and never use a smaller pump then a,75kW!

On Wilpet products:
I would rather use Ultra Zap products.

http://www.ultrazap.co.za/index.htm