Hello, I have the reactor is sufficient to my JBL external filter hängen.Die power, CO2 wash-is also good.The major disadvantage of the reactor is capable of Co2 Anschlußes.Da he is right on the inlet, the bubbles gather above despite the propeller directly under the cover an.Dadurch the propeller rotates partly by the bubbles are the part a noise that sounds so like water from the reactor laufen.Ich am already dozens of times during the night of fright with the flashlight under my Located pool and have a leak searched until I found where the sound entsteht.Wen that does not bother, otherwise get a good reactor. Meanwhile, the plug on the filter is the cautious change of Co2 hose, aborted! And although I very carefully war.Ich wrote to Sera but no response bekommen.Da you also the lid can not be bought individually is now the 25 Euro for a part plug of 0.001 cents worth, defective! Too bad!