Simply Koi and More Koi

Anyone share their thoughts on the Above units. How easy they are to install and maintain as well as the running costs? i.e power consumption, replacement UV tubes etc. Is the outlay worth the results etc. I've a 5000 gallon kidney shape koi pond. Your views and experience would be much appreciated.

vippymini, Thanks for the advice. I think the pipe is really blocked up as only a trickle came out when the pump was on. I think I'd find it hard to get some string to flow along the pipe (maybe 30 feet plus long).

Gazza, Thanks, it's soft alage/pond weed inside the pipe and the pipe would be difficult to replace. The large diameter inlet pipe goes underground together with the narrower outlet pipe underneath the crazy paving. the outlet pipe runs under the edge of the pond to meet up at the other end where it...

My father has a Koi pond with 2 UV lamps, old style rectangle filter boxes (one with the extra large bottle brush style nylon brushes then links to another tank with the 'cut up' vacuum pipes, which I believe is for the growth of good bacteria then a pump which then sends the clean water through 2 U...