
Well Bud,hope you realise I have just joined this forum to say WOW!!!!! Love your ponds and the pictures of your koi,I really take my hat off to you!!

They are stunning....but you got me thinking...only had a pond since last year so still new to all this, my pond is about the same size as your goldie pond but have this year made it 4ft deep as bought some ghost koi but suffering really bad with the murky water!! Have at the moment a 3000litre pump (hozelock cyprio) going to a cyprio filter (plastic cones and one layer of sponge) have added a layer of wadding but still got problems. The pond is 380 gallons and the pump is feeding a waterfall...all I know about the filter is that it is for a medium sized pond!!! LOL told you I was new to this!!!
Use the api test kit and have never had any problems with Ammonia,nitrite or nitrate so guess the filter is working??? Can hardly see the fish

Using a 8uv bulb( new)
My ph is a problem though daytime its 8.2-8.8 at the moment (very hot and sunny here at the moment) and in the morning its 7.2 ??? the waterfall water (after going through the filter is 7.2 but in the pond its 8.8

??? I'm just jealous really that you have lovely clear water and stunning fish and I have a murky cess pit LOL
Any advice would be greatly received.
Cheers Amanda