De-pond the garden pond - instructions and tips for sludge reduction

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Well, where are the fish going? If the water is so cloudy that it can no longer be seen, it is high time to desmuddle the garden pond. Here is a guide.

Garden pond always de-flow in spring

What falls into the garden pond all year round and seeps to the bottom is very remarkable. Algae, dead plant parts, fish excrement and leftovers that sink to the ground do the rest. No wonder that over time, this also forms a thick, slimy layer of mud that also clouds the pond water. By then you have to act and deslag the garden pond. If you do not, it can happen that you eventually have a stinking mud hole instead of a beautiful biotope in the garden.

When is the best time for sludging?

The best time for slurrying is spring, before you put your fish back in the garden pond. So you do not have to catch them again later and place in water tanks to de-pond your garden pond, because you have to drain the entire pond water. This will save you and your fish a stressful ordeal.

Pond vacuum cleaner with low pollution

If the water of your garden pond has only a small amount of dirt, it is sufficient to use a normal pond vacuum cleaner. Popular are these 3 models:

However, you should carry out the following instructions in the case of heavy silting up.

Instructions for deflating a garden pond

➥ Step 1:

First of all you have to remove the complete water from the pond. This is especially easy with powerful pumps. This also has the advantage that the aquatic plants are not too long exposed to the sun and the heat.

➥ Step 2:

If the pond water is completely pumped out, you must then resettle and control all aquatic plants. Cut back, for example, aquatic plants that have become too big, as well as unsightly shoots.

➥ Step 3:

Now it goes to the real work: the slurrying. You have two options. On the one hand, you can use a special sludge extractor that can be borrowed from the specialist company, or you can also work with a bucket and shovel. First of all, first remove the mud layer.


Be careful in this step! This is the only way to prevent the pond liner and the pond fleece behind it from being damaged.

Tip: offers pond liner directly from the manufacturer.

➥ Step 4:

Now, a high-pressure lamp should be used, as it can remove mud and algae growth particularly effectively from the pond liner and the stones.

Then pump off the resulting contaminated water again.

➥ Step 5:

If the pond is completely empty, you should also check the pond liner for damage and repair it if necessary.

6 Step 6:

If the pond is clean, you can refill it with fresh water and use your pond plants and fish.

Tips for sludge reduction

You can do a lot to prevent a thick layer of mud from forming on the bottom of your garden pond. Only follow the tips below and you will save yourself the regular deluge in spring.

➤ Tip 1 - Place aquatic plants in the pond:

In order to give the algae formation no chance, garden plants are essential. These deprive the algae of the nutrients. Cut the water plants on top of that regularly, bind them through the growth even more nutrients themselves, with the result that the algae virtually starve.

➤ Tip 2 - Stretch the foliage net over the pond:

Especially in autumn, it makes sense to stretch a net over your garden pond so that the autumn leaves do not fall into the water. This can then not rot in the pond and thus not contribute to the formation of a layer of mud.

➤ Tip 3 - To fish algae:

In addition, it is also important that you regularly fish algae so that they do not spread explosively in the summer. Fishing reduces the nutrients in the water, which in turn prevents the algae from multiplying. Popular are these 2 algae nets:

➤ Tip 4 - use ecological pond sludge remover:

If you use an ecological pond sludge remover, the mud layer will not be that thick. This product degrades the pond mud with the help of oxygen-producing bacteria, which keep the formation of algae (reading tip: How algae arise in the garden pond) in check. Just a few hours after using the ecological pond sludge remover, the pond water becomes wonderfully clear again.

Video Board: How to Clean an Outdoor Fish Pond.

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