
Attached to the pad is a micro filter which isn't too bad other than needs to be replaced when clogged. Kind of a shame as you should never replace it unless it starts falling apart. The micro filter does where you should. I ended up cutting and customizing my own filter pads.

Powerful And Quiet Submersible Pump For Aquarium, Pond, And Hydroponics: KEDSUM 660GPH Pump With 6Ft High Lift And 3 Nozzles
29 Review

KEDSUM Quiet Rechargeable Battery-Operated Aquarium Air Pump With Dual Outlets - Perfect For Fish Tank, Outdoor Fishing, Transport, And Emergencies
28 Review

Sink filter Prio New Water Start Osmos OU380 white
79 Review

Humidifier / air purifier "Fanline Aqua VE400" with an ionizer, with a capacity of 410 gr/h
44 Review