The Perfect Medium

Simon's Simple Hydroponics Plans

Hydroponic Grow Systems

Get Instant Access

Fine sand features very small interstitial spaces that cannot hold much air and water. On the other hand, coarse gravel has large interstitial spaces that can hold a lot of both air and water. Yet, as science would have it, once the interstitial space gets to be too large for capillary action to hold the water in place, you guessed it, the water runs right through it. If your system constantly recirculates your nutrient solution, a fast draining medium would be acceptable. But obviously, coarse gravel isn't a good medium for a system that doesn't constantly circulate nutrient to the plants.

  1. Holds a even ratio of air to water.
  2. Helps to bufferpH changes over time.
  3. Is easily flushed and re-wets easily after being completely dehydrated as would be the case during storage.
  4. Is reusable or biodegradable to insure safe disposal.
  5. Is inexpensive and easy to obtain.
  6. Should be lightweight and easy to work with both indoors and out..
Gravel Landscaping

Pictured from left to right are the most commonly used loose mediums for hydroponics; Coconut Coir, Agricultural Grade Perlite, Expanded Clay Pellets and Common Pea Gravel. Each of these mediums may be used alone or in combination with each other to enhance performance. For instance, Coco Coir is commonly mixed 50/50 with an equal volume of Perlite to provide a higher air holding ratio then Coir alone.

Pictured from left to right are the most commonly used loose mediums for hydroponics; Coconut Coir, Agricultural Grade Perlite, Expanded Clay Pellets and Common Pea Gravel. Each of these mediums may be used alone or in combination with each other to enhance performance. For instance, Coco Coir is commonly mixed 50/50 with an equal volume of Perlite to provide a higher air holding ratio then Coir alone.

Was this article helpful?

0 0
Growing Soilless

Growing Soilless

This is an easy-to-follow, step-by-step guide to growing organic, healthy vegetable, herbs and house plants without soil. Clearly illustrated with black and white line drawings, the book covers every aspect of home hydroponic gardening.

Get My Free Ebook


Post a comment