Ok, two questions here...
Q: First to quote: The creator of the Matsunosuke bloodline of Nishikigoi

and propose your theory and product to him personally. Our American Express cards await his response.
A: we don't take American Express...sorry and actually any biologist who is a koi breeder can usually determine if any food, nutrient or device is harmful or beneficial to life forms. In fact, I'd say most breeders...you as well...know the benefits of adding air to a pond full of aerobic organisims (like fish) ... I saw an article on using a large grinding stone and tube for this...but I am sure there are cadillac model aerators as well.
And the device is NOT meant to replace them. The more air the merrier as they say...
Q: it only works when it's adding water?
A: I see a devil of an engineer in you coming out and you are very close.
Actually it passes a moderate amount of air bubbles all day long and when a pond is low it passes more...quite a bit more and wave action causes a bit too. HOWEVER if the pond is a bit overfull and there are zero waves it probably won't pass any air so the margin is within 1/32 or 1/16th of air in or not...which takes almost no time to evap and so it again begins to add air...in increasing amounts as the pond level evaps/drops more.
Q: 3 - do I see the skeptics out there?
A: If you told me you had a product that did 5 different things that were of benefit to my pond and I had a few thousand bucks in there I would examine the device in action with a probing rectal scanner and review the feedback from others who have used it before spending a dime.
Naturally they come with a 30 day money back etc. and the longest warranty in the industry on this type of device...5 years. They are virtually indestructibe. A gent just bought one in the U.S., it shipped and he wanted me to get him two components that he can get locally, but we thrive on support so I'm getting them up here, sending to him and he said he's going to paypal the payment, but little does he know the receipt/invoice I'll slip into his package will only be about half the cost for this 'hardware store' item.
Why would I cheat myself on that? That's a question you have to wonder, eh?
Well, first if I got it at a large store it would be about half and I am not driving 30 miles to Home Depot so he can have it for about that price. That keeps people from getting upset over local hardware store prices.
Next, I figure we already made a profit on the unit. The $5 or $10 we eat on the difference is worth the customer smile. A lot of businesses do cut and dry invoices; you pay for every penny and having written accounting software for 25 years, you pay a guy like me to count every penny on your computer. What many firms don't realize is that the first time a customer gets outstanding support, I mean Ritz Carlton style (I worked for them too) and/or something free that isn't really cheap, the first time either of those things happen they become customers for life and will tell all their friends you're simply the best.
If you had a business model and CPA and Controller and Comptroller it's difficult to wedge that sort of support into the corporate cracks...they'll all laugh at you or chew you out. But if you're the CEO you can damn well play the game anyway you want...I do. I've supported folks for 25+ years so well my wife married me after a year of phone support for a large accounting package she bought for her half mill operation....we joke she liked the package so much she married the programmer...these days she's married to a cabinet maker but that's a different story.
At any rate, break out your rectal scanners if you will: I've seen the movie before and I don't blame you a bit. Probe, question, ask away and I do want to stress one very important issue here...and that is...
I really do thank you for your interest, time and consideration at this forum. It's been a great place to get to know a few lil devils. Have a great weekend.