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  #1  
Unread 02-20-2012, 08:39 AM
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Default What are the benefits/drawbacks of semi-hydroponics vs hydroponics?

What are the benefits and drawbacks of a semi-hydroponic system vs. a hydroponic system?

Last edited by Enjru; 07-14-2012 at 09:44 AM..
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Unread 02-20-2012, 09:08 AM
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Semi-Hydroponics involves the use of an inert medium, in single-pot, passive culture. The classic definition of "hydroponics" involves recirculation pumps, automated monitoring and adjustment of the solution chemistry.
  • Semi-hydroponics involves more labor (mixing fertilizers and actually watering),
  • requires a medium (while classic hydro may- or may not),
  • does not require monitoring of the solution chemistry (it is fresh at every watering),
  • requires no investment in tanks, pumps, flood tables, or instrumentation, and
  • by not sharing a common, recirculating bath of nutrient solution, eliminates the ideal vector for sharing plant pathogens.
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  #3  
Unread 02-20-2012, 12:15 PM
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Wouldn't hydroponics also drown the roots?
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Unread 02-20-2012, 04:21 PM
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I've used both semi-hydro and passive hydroponics, often called hydroculture, using a system similar this this:
http://www.hydrocenter-kw.com/images/luwasa.gif
This system uses a float to show how much solution is in the reservoir, and recommends to just top-up the solution to the recommended level.

I've found after about a year, the hydroculture plants start to decline because if you don't always dump the existing solution and flush the LECA, it results in salt buildup that damages the roots.

Semi-hydro works much better in the long run simply because of the 2 holes in the side that force you to flush and replenish with fresh solution with each watering.

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Last edited by DelawareJim; 02-20-2012 at 04:26 PM..
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Unread 02-20-2012, 04:24 PM
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Quote:
Originally Posted by Connie Star View Post
Wouldn't hydroponics also drown the roots?
No, not once the roots tailored to the environment grow.

Most "full-blown" hydroponic systems tend to be wet-and-wait processes anyway, so there is always some "breathing" time.
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