Paffrathschale (Paffrath Bowl) for (Bio-) CO2

Here is my design for a paffrath bowl for introducing (bio) CO2 into the aquarium water.
I have used the German Wikipedia page as a data source:
https://de.wikipedia.org/wiki/Paffrathsche_Rinne.

In my case, the bowl is designed for an approx. 360 litre aquarium and a basic KH value of up to 10 KH. -> 108cm².
I use G1/8 plastic hose fittings (G 1/8" - 6 x 4mm) as the screw connection for insertion and venting:
https://www.amazon.de/dp/B0BSLD5BBT

The suction cups are from Amazon: 
https://www.amazon.de/dp/B01N4ERZZF

As the parts are not yet available, this design is only "BETA" !!!