New Pond String Algae Need plants?

[j.w]

@willc and @Meh It's not just you getting those double posts, I and some others are also. Not sure if it is because I use Firefox browser or what but I have always used that browser w/no issues before. I don't know where @Ian our administrator for this forum is?
Maybe on vacation or ?

 

[Lisak1]

You can absolutely have a pond, but there's not a pond anywhere that's suited for koi at only 1000 gallons. Whoever sold you those koi is an idiot. Or a shyster. But we've had lots of posters here with ponds in hotter zones - definitely not a problem. Your question was about plants - you put shade plants in a sunny pond. That aint gonna work nowhere, zone 9 or zone 5.

Mosquito fish is an interesting conundrum:
A. Goldfish are prolific mosquito larva eaters - some say far better than so called mosquito fish. They use them in abandoned swimming pools because you can eventually douse the pool with chlorine and kill them off - no one seems to mind killing them, but goldfish would be a bit less popular of a choice.

B. A pond with moving water will never breed mosquitoes anyway so there's really no need to add them

C. I've read horror stories about pond owners trying to get rid of gambusia once they have them in their pond - it's nearly impossible. One guy drained the pond completely, let it sit for several weeks, refilled it and... more mosquito fish. He suspects they managed to stay alive somehow in his plumbing.

 

[Hound Heaven]

Just a couple of ideas having lived in the desert for a few decades - shade cloth over the pond would maybe help, watercress grows like crazy and might help, creeping jenny also seems very vigorous, Pickerel Rush too. Mexican Petunias did well for me till we got a hard freeze. Aquatic Hibiscus is another idea - actually I just tossed in a Luna Pink Swirl and kept the crown above water in the bog and it's doing great. Good luck it's terribly frustrating but you'll get it worked out.