The system is good, everything is done quite qualitatively. I will describe some of the moments I have encountered and which seemed unobvious at first glance. 1) ceramic diffuser need pre-soak in water. Soaking for about an hour; 2) ceramic diffuser need pressure more than 1 atm to start work; 3) when you reach the stage to squeeze a bottle of citric acid to start the reaction, it is necessary to squeeze it well to pour more acid. I stopped when I was the first pshik, and the system gained weak pressure, insufficient to make the ceramic diffuser start work. Air sprayer at the same time earned, he does not need much pressure 4) the hose in the kit is only 2 m, came very crumpled-you can straighten it under hot water. The production of the system took about 70 cm. That is, consider whether you have the rest to start gas in the aquarium. I did not have enough, I bought the hose additionally. It was difficult to find a transparent hose for CO2.

The product came quickly, no comparison with the new application, although this product was ordered much later than there and in the new application no one knows where it is until now. The goods have not yet used, there is no way to check for tightness yet.

The CO2 generator works, connected everything well. This is the second CO2 system we order from this seller, bought on the second aquarium. Plants aquarium grow quickly, juicy, bright. Everything works fine and the seller is also excellent. Recommend.

To Moscow 13 days in Pyaterochka. all the whole is not even soft. connect as on video. difuzor is good quality but bubbles on one side. Maybe the pressure is not enough can still be new. I'll test the feedback later. I'm happy. but expensive.

Everything is fine. The pressure gauge works, the solenoid valve works as it should, it was removed, I will blow 24/7 and see there. Proportions of 450 lemons per 600 water and 500 soda per 300 water. I blow to the outside. Good luck to all.