Google the Calgary garden show and ponds. There was a guy there talking extensively about hydrogen peroxide and ponds. Sadly I was there for the bees and didn't catch his name.

will do thanks !

Last year my pond turned green after my UV light crapped out, and took a while to find a replacement. But once it was replaced, it cleared right up again.

I turn off the UV light for the winter, and then on again in the spring as the water warms up and I detect a loss of clarity. Right now, mine is still off, but I think I will turn it on very soon now.

Also, have never changed the water in the pond. But of course, living here on the coast with the rain, as a lot to do with that. I have finally had to start adding water now to keep it full,.... last time for that was back last fall.

Ya I find that a UV definitely helps with that suspended algae that greens your water. I try to replace my UV bulb every season. I don't know if that's overkill or not but it definitely helps. The bulbs can be a challenge to source at the beginning of the season.

One thing I love about koi is that there is so much variation and variety in them. I see your fish and have a bit of fish envy, but you probably see mine and feel the same way. In the reef, a yellow tang is a yellow tang, they don't vary too much. But with koi each one of them has different personality. Can't wait to visit you to see your pond and reef one day.

Yup! Actually I have total pond envy :-)

You're right though, there are so many different koi!! It's addictive once you start collecting, but you know your pond can only hold so many. Also, I do find that koi are much more personable than marine fish.

Kien you know how to live life.

humm this is an odd choice in fish food but it looks like it's working for you, I might try to switch to the grilled chicken burger for the reef tank :}

I was just telling my mom about your pond. She would LOVE to do one, but then she sees how much work a reef tank is and said nope, not for her! Not sure what's involved in looking after a pond but it sure looks a lot more relaxing!!!