Jonathan Z. Kremer (better known as Yoni) is the proprietor of "Yoni - Electrical Design and Installations" , a Maale Adumim (Israel) based business that has been serving primarily Jerusalem, Maale Adumim, and surrounding areas since 1989. We undertake various forms of electrical work including renovations, maintenance, installations, and repairs - encompassing the domestic (home), industrial and commercial arenas. We believe that our success tomorrow will be determined by how well we serve you today. http://
The Ebb & Flow is a versatile system that can be used with a variety of growing mediums. The entire grow tray can be filled with Grow Rocks, gravel or granular Rockwool. Many people like to use individual pots filled with growing medium, this makes it easier to move plants around or even move them in or out of the system. The main disadvantage of this type of system is that with some types of growing medium (Gravel, Growrocks, Perlite), there is a vulnerability to power outages as well as pump and timer failures. The roots can dry out quickly when the watering cycles are interrupted. This problem can be relieved somewhat by using growing media that retains more water (Rockwool, Vermiculite, coconut fiber or a good soiless mix like Pro-mix or Faffard's).