Every year at this time I pump 50%ish of my pond water into 6 plastic dustbins - net the fish - place in bins - pump the rest to the garden. then clean the algae from the liner with a window rubber scraper - soft shovel out the sludge - keep the bugs - part fill with tap water - add declor - pour the 6 bins of pond water back in - introduce the fish wash the plants in old pond water - put back in along with any bugs I saved - whack on the air and pond pumps and pond filter and job done. Many will disagree but I have never lost a fish (large goldfish - don't know about Koi) in my years of doing this methodology. Works well for me - the fish are happy & breed like billyo. Sludge buster is a waste of money... buy beer instead... Henrik
Hi Guys, Names Henrik - new member.. I have a garden pond - circa 700galls & over the last 8 years my goldfish have been breeding like good-uns.
Problem is I now have so many my filter is struggling to cope & I would like to reduce the number. Is it true you can't move them to local ponds without risking prosecution? Sorry if this has been covered previously - still feeling my way around the site Cheers H