- 27 Aug 2008
looks like electrolysis of water
Could it be a fancy version of this from the 1970s?
Patent US3891535 - Aquarium water treatment apparatus - Google Patents
On Freshwater shrimp it suggest the mini will accommodate up to 90l but on the twinstar website (user guide section) it suggest a mini will accommodate between 90l-120l?
Apologies, it is only the s model that prevents and kills fish disease.
It doesn't need to produce ozone (O3), the bubbles may well be oxygen (O2). If you have a look at Viktor's photo, as he says you can see filamentous green algae beginning to grow on the edge of the unit, and I just can't see how it can work against green algae. If it is producing oxygen, fine, but low oxygen levels aren't a problem that many planted tank keepers struggle with.The mechanism of action is that it produces chlorine from a chloride source (usually NaCl - dissociated as Na+ Cl- ions, but they can be at low concentrations) via a platinum electrode set. You can also produce ozone, oxygen and hydrogen peroxide via electrolysis.
Either way, amongst a thinking community like ours all this cloak and dagger stuff is perhaps more than a little counter productive...since most of us are quite rightly cautious about what we introduce to our aquariums for obvious reasons.
Quite evidently it's got to the stage where we need to know exactly what it is and how it works before we take it completely seriously and consider purchasing it. It could be as revolutionary as the manufacturers claim but we're not going to know for sure until - like George says - someone reverse engineers it or the manufacturers come clean. Until then I'll continue to treat it with a healthy dose of cynicism/scepticism...I don't invest in blind faith.
Just as an aside...I'm sure ozone is an odourless and colourless gas, so smell is not really a reliable diagnostic test...
Assuming it is electrolysis I think it is probably to do with the conductivity of the solution.Why only freshwater?
OK there is quite a lot of scientific work on micro and nano bubbles ("Principle and applications of microbubble and nanobubble technology for water treatment" < Principle and applications of microbubble and nanobubble technology for water treatment >). That would also account for the high cost of the unit, and why it wears out, in both cases because of the erosion of the platinum/palladium electrode set.The device uses technology to create micro-bubbles that destroy the cell wall of the algae in the end they can not grow. This technology is non-toxic and harmless for aerobic bacteria. The device is effective against, thread, brown, Xenia, blue-green ... But does not help in the fight with a beard and algal blooms.