Excellent value for money for hydro. I had the same problem, some people complained at first about bubbles coming out of the port, but unfortunately if that happens you need a more powerful air pump. They're bigger than they look and you'll need a more powerful air pump. I can run more than 4 times with an 18 watt air pump.
Aquael Fan Filter Mikro Plus
35 Review
Humidifier / air purifier "Fanline Aqua VE400" with an ionizer, with a capacity of 410 gr/h
44 Review
Sink filter Prio New Water Start Osmos OU380 white
79 Review
Powerful And Quiet Submersible Pump For Aquarium, Pond, And Hydroponics: KEDSUM 660GPH Pump With 6Ft High Lift And 3 Nozzles
29 Review