Attention obviously workmanship !!!

Actually, the Micro-Perler Dennerle is of a really good CO2 aerator, which converts the CO2 gas by the supplied ceramic disk in extremely small bubbles which optimally with CO2 saturate so the aquarium water (lt. CO2 measurement).
But I have now bought this device three times and the fourth order is in progress. Every time went to about three weeks, the thread on the Plexiglas housing broken as soon as I wanted to expand the algae-affected ceramic disc for cleaning. Not that I had not had sufficient skill, the Dennerle Micro-aerator obviously has a manufacturing defect and the thread broke every time in dozens of pieces.

Just to make sure I have time a device in a Zoofachmarkt (Megazoo) bought, but was aware of the above-described problem. So I have the seller also noted and he looked in about 3-4 original packaging in which the threads were already begun or even small cracks were observed. These he has taken immediately off the shelf and wanted to send it back to Dennerle. The left gebliebenden handsome Perlator I bought then and this also held a little longer than the others, but then went to about 8 weeks in the same way broken.

I'm curious times to just ordered equipment and will update here. Even with this experience I have to buy me a Perlator since the previous as described has again given up the ghost and I fertilizing with CO2 and pH holding stable.

Currently there are some sellers here on Amazon as well as in Megazoo specialty store delivery delays of 1-2 months to unknown time, so I assume that Dennerle has now recognized the problem and hopefully nachbessert production. If this is the case, there is of me 5 stars (maybe even a star deduction because of this history) at the moment with this experience, but unfortunately only 1 star.