JBL ProClean Aqua In-Out

Regular water changes
Food, plant remains and metabolic products pollute the aquarium water. Since aquarium filters can’t completely remove these substances from the water and a large part of the waste enters the aquarium bottom, a regular partial water change (about every 2 weeks 1/3 of the water content) needs to be carried out. Always siphon off the waste from the substrate when carrying out a partial water change. After the partial water change a good water conditioner such as JBL Biotopol is vital to render the new tap water suitable for fish.

Easy to install
Connect the water jet pump to the water tap. Connect the long hose to the water jet pump and the other end to the gravel cleaner. Hang the gravel cleaner inside the aquarium. Set the stopcock on the water jet pump to flow. Completely turn on the tap. The aquarium water will be sucked in by the water flowing past. While the water is being sucked in, clean the bottom of the aquarium with the gravel cleaner. To refill the aquarium, close the stopcock on the water jet pump and let fresh water flow into the aquarium.

If the 8 m hose is not enough, there is an extension set (JBL PROCLEAN AQUA IN-OUT Extension Set).

How to clean the aquarium bottom properly:
Push the gravel cleaner into the aquarium substrate with a twisting movement. The suction will pull the substrate and the dirt upwards into the gravel cleaner. The substrate will then fall back down under its own weight and only the dirt will be sucked out of the aquarium. With fine sand, you can adjust the suction by lifting the gravel cleaner so that the light sand also falls back down.
If you have a long-term substrate fertiliser underneath the covering gravel layer (e.g. JBL PROFLORA AQUA BASIS), do not insert the gravel cleaner far. Insert it only as deeply as the covering substrate layer is thick.