[APD] Re:Re: dirt, moderate CO2, and moderate light

["Robert H" <robertph3 at comcast_net>]

> Looking at the posts in Walstad's section over at the AB forums, I see a
> lot of people there having long term problems with her method. It appears
> to me that those problems stem from the definition of 'dirt' and all the
> results from variations of its composition. I see Tom Barr's approach as
> being more reliable and simple because the variables can be identified,
> quantified and controlled. To me, growing plants underwater seems to be
> more closely related to hydroponics than houseplants. The professional
> hydroponics folks remove the 'dirt' variable as well.

I don't see that in Dianas forum at all. What I do see is her forum is one 
of the most active on my WEB site. There are many people interested in her 
methods for various reasons, most of all I think because they want a no 
nonsense, less time consuming approach to be able to simply enjoy plants and 
watch them grow, not striving to have an "Amano like" tank. That dosen't 
mean they do not  have to face the same problems the rest of us do in 
fighting algae and other issues. What "long term" problems are you reffering 
to? Perhaps it would be more helpfull for you to be more specific.  I also 
do not see comparing any method to hydroponics as any valid comparison. 
Hydroponics uses a method for one thing and one thing only...rapid growth. 
This is achieved by injecting a very high nutrient solution, and a slow drip 
C02 solution at the roots while at the same time having the leaf growth in 
the atmosphere.  The only reason people choose the "Barr" method, or PMDD, 
or the Walstad method is to either  control algae or to find a more cost 
saving  method. Hydroponics has no concern for algae, and is definetly not 
cheap, so there is no comparison between a aquarium soil based method and 
hydroponics. It is two entirely different worlds. Personaly, I do a 
combination of the Walstad and high tech method, but thats just me.

Best regards

Robert Hudson
www.aquabotanic.com


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