Temporary home for goldfish

I'm about to do a major renovation of my main pond & have to move my two one-year-old goldfish. I've cleaned & refurbished my smaller pond & would like to put them in it but am concerned about how they'll do in the new, pristine environment since the water they've been in is old & green. Should I first transfer them to a container with half old, half new water? If so, for how long? If not, what should I do. I'd really hate to fill the secondary pond w/ their current water - I'd have to clean it again & simply have to face the same problem once the main pond work is complete.
Thanks for any advice.

I have always just put them into the clean water without any problems. They always seem grateful

Thanks very much! That is, of course, what I wanted to hear. A friend had suggested 3 water changes w/ ever-increasing proportions of the new over a course of hours but I think I'll take your advice.

p.s. 24 hours later, the fellows look fine! Thanks again.

Great to hear you had no troubles.

Gold fish adapt quickly. I've used the half and half system. just put out some test fish in the ponds that I finished before all the rain in Iowa hit this week. The koi is going nuts being cooped up inside.

Since it's what I wanted to hear, I went ahead & put them in the clean pond & they thrived. Thanks again.

You first clean and refurnish the old pond and just keep the goldfishes in.