From mmut7@central.sussex.ac.ukTue Apr  4 09:39:08 1995
Date: Tue, 4 Apr 1995 11:41:51 +0100 (BST)
From: Michael Carrington <mmut7@central.sussex.ac.uk>
Reply to: hydro@Hawg.Stanford.EDU
To: hydro@Hawg.Stanford.EDU
Subject: Stabilising PVC

Sandro Bombardieri wrote:
> 
> Mike, 
> 
> If you are using PVC tube ensure that the pipe is calcium-zinc stabilised 
> not lead stabilized. Lettuces make great accumulators of heavy metals.
> I would use the pipe in a NFT fashion or even as flood and drain.
> Using a medium will restrict root growth and will require frequent flushing 
> with water to eliminate any salt build up.
> 
> I have a few formulations for tomatoes. One of them is my own formulation.
> Some are a three stage. Being a chemist i enjoy making up my own mixes, as well
> as cracking existing recipes.
> 
> Two of my friends are commercial growers. One is an Aquatic plant grower and
> the 
> other a rose and tomato grower. I have from time to time made crop specific
> mixes with great success.
> 
> see ya
> 
> sandro
> 
>