White slime on a new aquarium root can look quite unpleasant. Many people discover it a few days after putting the root in the aquarium: a white, greyish or translucent coating that looks slimy or fuzzy.
In most cases, it is not dangerous. It is usually a biofilm, bacterial growth or fungal-like coating that feeds on easily accessible substances in the wood.
Why do some roots get white slime?
Newer or more easily degradable types of wood can release organic material when they are exposed to water. This gives bacteria and microorganisms something to grow on. The result is the white film that many call slime, mould or biofilm.
It is common on several popular aquarium roots, especially at the beginning. In many aquariums it disappears after a few weeks when the easily available substances are used up.
Is it dangerous for fish and shrimps?
Usually not. If the water smells normal, the fish are behaving normally and the water levels are stable, a white film on the root is not normally a disaster.
But that doesn't mean everyone wants it. Slime can look dull, stick to details and make a new aquarium less inviting. If the build-up is heavy, it's also wise to keep an eye on water levels, oxygenation and filters.
What to do if it appears?
You can brush off the coating with a clean brush or toothbrush when changing the water. Suck up loose material with a hose. Carry out normal water changes and allow the aquarium to mature.
Avoid chemicals. Do not try to solve the problem with strong agents in the aquarium. It is almost always better to work mechanically and let the balance catch up.
Why does Tuskwood behave differently?
A major advantage of Tuskwood is that heavy white biofilm does not usually occur. Tuskwood is genuine old bogwood that has been in an oxygen-poor peat bog environment for a very long time. It does not normally contain the same amount of readily available substances as fresher wood.
This does not mean that you can never see any tiny membrane at all in an aquarium. All aquariums are biological systems. But Tuskwood doesn't tend to get that heavy, slimy start-up coating that many people associate with some other roots.
When should you pay more attention?
If the water smells bad, the fish are gasping for air, shrimps start to behave in a stressed way or the fouling spreads over more than just the root, you should check the water values, oxygenation and filter. In this case, the problem may be more than just a normal root coating.
However, a white film on a new root, without other problems, is usually just a start-up phenomenon.
In short
White slime on aquarium roots is usually not dangerous, but it's not much fun. It occurs when microorganisms grow on easily accessible substances in the wood.
If you want to reduce the risk of this type of start-up, Tuskwood is a safe choice. It is old, stable bogwood that normally behaves more calmly in water and does not usually form a strong biofilm.
Read also our more in-depth article on why some aquarium roots get slime and biofilm.