The best way to do this is with a sludge cleaner. A sludge cleaner is a suction cup with a hose that is used in aquariums to clean the substrate and suck up deposits, food residues and organic waste. It helps to keep the substrate clean and improve the water quality.

And this is how cleaning with the sludge vacuum cleaner works:

Preparation: make sure the sludge cleaner is clean and ready to use. Check all components to ensure that they are correctly assembled.

Set-up: Immerse the sludge vacuum cleaner in the aquarium water to fill it with water. Hold the hose vertically upwards and ensure that no air bubbles remain in the hose.

Suction: Hold the muck vacuum cleaner with the suction opening above the area of the substrate that you want to clean. You can now suck in at the end of the hose or use a suction aid. As soon as the water flows freely through the hose, you can direct the hose into a bucket or other suitable container to drain off the extracted water. Or you can use a long hose so that you don't have to keep emptying the boiler. With the IN-Out from JBL you can also attach the hose directly to the tap.

Cleaning the substrate: Move the mulm vacuum slowly over the substrate, taking care not to suck up too much gravel or substrate. The mulm vacuum will suck up debris, food residue and organic material while the dirty water flows into the bucket.

Monitor the water level: Be sure to monitor the water level in the aquarium during the cleaning process to ensure that not too much water is removed. If necessary, you can add fresh water to correct the water level. The use of a mulm vacuum should be done regularly as part of aquarium maintenance to prevent a build-up of mulm and organic debris.

The frequency depends on various factors such as the size of the aquarium, the number of fish and the amount of leftover food. By using a sludge vacuum cleaner, you help to improve the water quality in your aquarium and create a healthy living environment for your fish.