Regular water changes
Food, plant remains and metabolic products pollute the aquarium water. Because aquarium filters cannot completely remove these substances from the water and a large part of the dirt ends up in the substrate, a water change must be carried out regularly (approximately 1/3 of the water every 2 weeks). The partial water change must always be combined with the extraction of the substrate. After a partial water change, a good water conditioner, such as JBL Biotopol, must be used to make the new tap water fish-friendly.

Easy in use:
Hold mollusk in the aquarium water, move up and down and keep the end of the hose in the bucket. Water flows naturally into the bucket. Clean the bottom with the molm clock. To stop, simply remove the mole bell from the water and/or close the shut-off tap at the end of the hose.

This is how the aquarium bottom is properly cleaned:
Move the mole clock in the bottom soil of your aquarium with rotating movements. The suction force pulls the soil and dirt up in the mud cup. Due to its own weight, the substrate falls back down and only the dirt is sucked out of the aquarium. For fine sand you can adjust the suction power by lifting the bell slightly so that the light sand falls back down. A sieve in the bell prevents accidental sucking in of fish and shrimp. The sieve can be removed for cleaning.
If there is a long-term fertilizer under the covering layer of gravel (e.g. JBL PROFLORA AQUA BASIS), the mole bell should not be inserted as deeply as possible into the substrate, but only into the covering layer of soil.