Well thats it the koi are now without their winter covering of Polycarbonate roofing and the net is back in place after a bit of a struggle untangling it from its cycles first in the washing machine (no soap) and then the dryer "an idea of Val's that has extended the life of the net keeping it in immaculate condition" 
We also cleaned the first filter of its winter muck and my god was it dirty but a quick pressure wash cleaned the matting the pads and brushes and the replacement bag of zeolite went in I also cleaned the vortex also draining 40% of the ponds water for the water change.
Last but not least prior to topping up the filter we added half a large bottle to the filter left it in the air for a hour then in water for another before switching everything back on.
Remember its at this time of year your fish can fall foul of the Areomonas Hydrophila bacteria and others which we dont want maintenance should be done to your own filters and if you have dead leaves in the pond detritus etc clean in with a pond Vac and our fish are all ready for the season
Then we can all chill by the pond without a care in the world throughout the summer months
Dave)
We also cleaned the first filter of its winter muck and my god was it dirty but a quick pressure wash cleaned the matting the pads and brushes and the replacement bag of zeolite went in I also cleaned the vortex also draining 40% of the ponds water for the water change.
Last but not least prior to topping up the filter we added half a large bottle to the filter left it in the air for a hour then in water for another before switching everything back on.

Remember its at this time of year your fish can fall foul of the Areomonas Hydrophila bacteria and others which we dont want maintenance should be done to your own filters and if you have dead leaves in the pond detritus etc clean in with a pond Vac and our fish are all ready for the season
Then we can all chill by the pond without a care in the world throughout the summer months
Dave)