<strong>Why does Leca have algae?</strong>
Leca can sometimes develop algae growth due to its porous nature and ability to retain moisture. Algae thrive in environments with excess moisture, sunlight, and organic matter, and these conditions can occasionally occur within the tiny air pockets and crevices of the Leca clay balls.
Algae spores can find their way into the Leca substrate through various sources, such as the surrounding air or water used for irrigation. Once they settle in the moist environment of the Leca, they can quickly multiply and form visible colonies of algae.
Leca, short for Lightweight Expanded Clay Aggregate, is a fascinating material composed of clay balls that undergo a baking process, causing them to expand. Imagine them as clay popcorn or Aero Bar chocolate, except instead of indulging your taste buds, they serve as a perfect substrate for your plants. Leca possesses a unique characteristic – it has a highly porous texture filled with countless tiny air pockets that roots absolutely adore.
What makes Leca even more intriguing is its ability to absorb water. When you water your plants, these clay balls soak up the moisture and expand slightly, ensuring that they retain their porous structure. This super absorbent quality is particularly beneficial for plants that dislike excessive watering. In fact, Leca has the remarkable capacity to absorb around 30% of its own weight in water, making it an excellent choice for those seeking a substrate that helps prevent over-watering.
The porous texture and tiny air pockets within Leca provide numerous advantages for plant growth. Firstly, they facilitate aeration, ensuring that the roots receive a sufficient oxygen supply. Adequate oxygen levels in the root zone are crucial for healthy plant development. Secondly, the air pockets also assist in drainage, preventing waterlogging and root rot issues that can arise from overly saturated soil.
Furthermore, Leca offers exceptional insulation properties. It helps maintain stable root temperatures by retaining heat during colder periods and providing a cooling effect during hotter seasons. This insulation capability contributes to a more stable and favorable environment for root growth, supporting overall plant health.
Another advantage of Leca is its inert nature. Unlike some other substrates, it does not release any harmful chemicals or alter the pH of the soil. This makes it a safe and reliable choice for a wide range of plants.
<strong>Preserving the Benefits of Bacteria</strong>
If you belong to the group of gardeners who prioritize the preservation of beneficial bacteria and prefer not to use boiling methods, there are alternative approaches for you. Begin by thoroughly cleaning the clay pebbles, ensuring that all debris is removed, and perform multiple rinses to flush out any remnants of old plant matter. This step is crucial to prevent the accumulation of decaying material over time.
For effective initial cleaning, solid bottom 1020 grow trays are highly recommended. Start by placing a layer of pebbles at the bottom of the tray and add just enough water to submerge the pebbles. Using a stiff scrub brush, diligently scrub the pebbles, taking advantage of the low water level that allows them to rotate during cleaning.
After thorough scrubbing, it's time to perform multiple rinses to completely flush out any dirt or materials clogging the pores of the pebbles. This rinsing process works best in a 5-gallon bucket equipped with multiple drainage holes. To facilitate easy drainage, drill holes with diameters ranging from ⅛” to ¼”. Ensure that the bottom of the bucket has several holes, along with additional holes around the sides to maximize drainage efficiency.
