0

Your Cart is Empty

Soak before use?

March 17, 2021 3 min read

Soak before use?

Many varietals of wood are used in aquascaping.
The majority soften after being submerged, releasing tannins and tree sap. These tannins tint the water brown while the sugars from residual tree sap often give rise to fungi/mould.

While potentially unsightly, neither tannin-stained water nor fungi / mould are particularly harmful. However these substances can start clogging filters if present in very large quantities, typically only in aquascapes that utilize a lot of wood, as the one shown in the picture above.

Fungus on wood

Above: White / translucent gooey fungi feed on the tannins and sap released when dried driftwood is submerged. This is normal and clears up naturally after a few weeks if the tank has good filtration and is properly cycled.

In working with wood, the best approach depends on the amount of wood you are using.

A few small pieces

If you are only using a small amount of wood, the easiest way is to have them in the tank during the cycling phase (lights off, filter on) which should typically take around 3 to 4 weeks (yes, longer than we prefer!)

During that time, the water might turn a little brown and fungus may appear on the wood. It is perfectly normal. Simply change water every few days.

The tannin stains and fungi should disappear naturally after the tank has been properly cycled, and ready for planting.

A moderate amount

If you are using a moderate amount of wood, it may be good to soak the wood first, which means submerging it in water, either in the tank or in a separate bucket, for a few days or a couple of weeks (depending on how much staining and fungus develops).

If soaked in the tank itself, we would typically keep both lights and filter off at this soaking stage.

Water should be changed every few days, until the water is considerably clearer and there is far less fungi.

At this stage we turn on the filter, and the normal cycling process begins. This prevents choking the filter with debris/tannins.

A large amount

If using a large amount of wood, it is generally a good idea to soak them first. This means simply soaking them either in the tank or in a separate container, no lights and filter, for as long as it takes for the tannins to leech out and the fungus to clear.

We generally would not recommend boiling the wood as it can break down and soften the internal structures of the wood. For certain wood types like Malayan driftwood that is very tough, boiling can indeed be one way to accelerate tannin release without the integrity of the wood being affected much.

However for more delicate wood types like Senggani wood, boiling them beforehand can accelerate their break down.

Boiling the wood isn't necessary in the majority of cases.

Diatoms

Above: It is usual for new tanks to have diatoms. This can be reduced by giving time to cycle a tank before planting, but even then may occur to some degree. The right course of action is really to do nothing at this stage. The diatoms would naturally disappear after a few weeks, leaving the plants unscathed. We can speed up the process by changing water the 2Hr Way more frequently during the first few weeks.

In summary:

  • Expect wood to release water-staining tannins and trigger fungi growth after being submerged. They can be unsightly, but are relatively harmless.
  • If using a moderate or large amount of wood, soaking them to remove excess tannins and sap is a good step before the usual tank cycling process.
  • In new tanks, Diatoms are unsightly but relatively benign and generally disappears by itself. You can minimise their occurrence by giving time for the tank to cycle before planting and adding livestock.


Also in Hot Topics

Chlorine a concern?
Chlorine a concern?

May 03, 2021 2 min read

Is it really necessary to use a dechlorinator? Is it one of those common but unnecessary additives for a planted aquarium?
Read More
Holes in leaves?
Holes in leaves?

April 21, 2021 2 min read

Holes in leaves are often associated with nutrition deficiency.
And they might be. But a lot of the time, they are simply the victim of hungry fish and shrimp, what we call ‘herbivore damage’.
Read More
3 beginner traps
3 beginner traps

March 29, 2021 2 min read

If your plants don't seem to be able to survive for long in your aquarium, one reason might be that these are not aquatic plants in the first place. Or rather, these plants need to grow emersed (i.e partially submerged) and cannot survive permanently under water. We cover 3 common plants in this category.
Read More

Subscribe