Simply Koi and More Koi

Thanks Chris, Ive tried it with an 80ltr pump instead of the 40ltr one thats on at the moment but they still clung. I would like to open up the holes in the air ring as you suggested but as the filters are not yet mature (pond only running for a month) I'm a bit worried about stopping the air to the...

Hi all, Ive notived recently that the k1 in my Nexus 200 is sticking to the mesh in the bio chamber before it enters the outlet. Does this mean that the pump is to powerful? The pump is an aquamax 8500 on the nexus from a 4in bottom drain, the pond is 3840 gallons. Oh and there is an aquamax 12000 o...