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Perlite Horticultural Grade - CLASS B

CRS Hydroponics Enterprises


Perlite is a very common growing medium that has been around for years, usually used by traditional gardeners to add aeration to soil mixes.  
As a mined material, a form of volcanic glass, perlite is created under intense and rapid heat. Then countless tiny bubbles pop outs like popcorn. So as you can guess, it is very lightweight and porous.

Perlite is a good choice for the wick-type hydroponic system since it makes an excellent standing wicking action. But because of its porous and easy-to-flow nature, I don't recommend using this medium for quick and strong watering systems like the ebb & flow. It can be washed away fast & easily.

Able to hold air very well, having neutral pH, but easy to flow, Perlite is rarely used alone. People often mix it with other growing mediums like vermiculite, coco coir or soil - A common combination is with vermiculite in equal quantity (50-50) 

One caveat to working with Perlite is that because this medium is in small and porous particles, you should protect your inhalation when working with. Get it wet beforehand, then rinse out to keep the dust from bubbling around.

Benefits:

Reasonably inexpensive
Lightweight
High air retention.
Reusable
Downsides:

Lightweight, not suitable for certain system kinds.
Dust from the medium - effects on the environment and health
Can be used in drip systems, aeroponic systems. 



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