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Hydroponic Growing Media Expanded Clay Balls
Specifications of LECA Clay Pebbles
Items
Result
Particle Size
2-4mm,4-8mm,8-16mm ect
Main Material
Clay
Apperance
Ball
Surface Density
1.1-1.2g/cm3
Bulk Density
300-350kg/m3
Rate of Floatage
95%
The sum of damage rate & Wear rate
3.0%
Accumulation porosity
20%
Hydrochloric acid can let rate
1.4%
Friction loss rate
2.0
Water Absorption
15%
Particle composition
60-63%
Horticultural Clay Pebbles is a perfect choice for growing strong, healthy plants. They’re 100 percent clay, which fosters premium aeration and drainage, as well as excellent pH and EC stability. The pebbles are also pre-washed, to ensure better stability. Expanded clay is a popular medium for both aquaponic and hydroponic gardening around the world. It is also known as Light Expanded Clay Aggregate, or LECA. Expanded clay is the inert hydroponics substrate of choice for professionals. It provides stability and the pebble has an ideal surface for roots and beneficial bacteria. The porous structure has a high water capacity and is suitable for both flood & drain and top irrigation systems. In aquaponic and hydroponic systems, soil is replaced by these natural clay pebbles, which are derived from a renewable and plentiful source (clay) so it is considered an ecologically sustainable medium. The clay is formed into pellets and then fired in rotary kilns at 1200Cº. This causes the clay to expand inside, like popcorn, and become porous. pH neutral, reuseable and structured like honeycomb – the porosity and surface area gives it ideal water retention qualities for growing.
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1-3mm Expanded Vermiculite
Product information : vermiculite
Vermiculite, chemical formula M g × (H2O) [Mg3 × (AlSiO3O10) (H2O)], is a magnesium water inclouded aluminum silicate
secondary metamorphic minerals of layered structure. It likes mica in form, and usually come from weathered or hydrothermal
alterated black (gold ) Mica. It will present a deflection shape after heat expansion and water loss, liking a leech pattern in form ,
so it gets the name vermiculite .
Vermiculite features
Raw vermiculite will be expanded to many times when heated at 850-1100 °C, poisonless, odorless , corrosion-resistant, Non-combustible , natural refractory properties , Good thermal insulation , low density , Heat-resistant ,sound-proofing .fire-proofing etc .
Vermiculite chemical :
Item SiO2 MgO Fe2O3 Al2O3 CaO K2O H2O PH Content % 37-42 11-23 3.5-18 9-17 1-2 5-8 5-11 7-11 Horticulture Vermiculite :
Vermiculite has been used by plantsmen, propagators, growers and gardeners for decades and our standard Vermiculite and Fine
Grade Vermiculite will allow you to improve your seed sowing germination rates and give your seed and potting compost mixes
the edge.
Supplied in easily manageable re-sealable bags, both grades of vermiculite - a naturally occuring non-toxic mineral - will benefit
seeds and seedlings; the standard is ideal for mixing with seed sowing and potting composts where it absorbs nutrients and
moisture before releasing them near the rootzone, whilst the fine grade is perfectly suited for raising and covering smaller seeds
where damaging soil temperature fluctuations are kept to minimum.
Simply mix the vermiculite with potting compost, use exclusively as a seed sowing medium or cover your seeds after sowing and
just watch the results!