Long-time lurker here, wanted to get opinions on something I found that I think is interesting (and probably some kind of hoax) that I can't find discussed here...
So, if you google "fish tank without water changes" the first link is to this discussion
from 2 years ago on the My Aquarium Club site. You scroll down to post #7 and you see a post from someone claiming that "The technology to operate a fish tank without water changes is real and is hear now and it is the least invasive of anything out there". They go on to describe an under gravel electrode system that applies a small amount of electrical current to what is presumably some kind of filter media which supposedly limits 'bad' bacteria reproduction (when feeding every other day). Discussion continues on another thread
with everyone else applying a healthy dose of skepticism.
Fast forward 2 years and I have stumbled across a flashy website
along with a facebook page
threatening an imminent (as of November 2016) Indiegogo campaign. And last but not least a patent application
for exactly this, registered under the name of David Simeoli (who is the presenter in the only youtube video on their account
) that talks about an applied 50-100mAh at 2.4-3V.
So... an elaborate hoax? I have heard of something called Electroporation, which is applying an electric current to affect cell membranes, but it's not typically used on bacteria. Although I have found these two papers (1
) that talk about using low currents to purify water (and this science fair project
- that links to more) and it seems like there might be something to it.
Thoughts? And anyone fancy giving it a go on an unpopulated tank with some excess water from a water change?