QUOTE(Norfolklights @ Apr 4 2006, 05:19 PM) [snapback]546883[/snapback]
Hey red dragon
Nice post about the 205 tanks m8 somthing to consider

but lets not confuse the poor man by showing him a list of nutrient def's

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Thats what its there for, and only he has the plants in front of him. Using the nutrient deficiency FAQ allows him to fully investigate all possible issues, not only the ones people who answer in this thread mention!
QUOTE(Norfolklights @ Apr 4 2006, 05:19 PM) [snapback]546883[/snapback]
We have sooo many people in the store asking for epsom salts for mg def. But we are hard water here so we have too much Mg in the tap water

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It matters not how much Mg is in the water if its chemically locked out. There might as well be none.
I also live in a hard water area but thats not to say I have never suffered with Mg deficiency. The FAQ I linked to would also mention that the high Ph could lock out magnesium (as well as a raft of other elements), which no-one (thus far) has mentioned. Thats another fact the new grower would come away learning.
QUOTE(Norfolklights @ Apr 4 2006, 05:19 PM) [snapback]546883[/snapback]
Normally its PH fluctuation in the tanks, so yes I would empty out the tanks on a 2 to 3 day rota. And Look into Canna's Aqua range of nuts for even more stability

Water quality is everything in NFT. No matter how you "term" it, its generally responsible for a high percentage of NFT problems. Using the deficiency guide allows the grower to do some of his own legwork, by reading about side issues that can result from a totally different issue or set of symptoms he may previously have had no concept of.
This gives a better understanding of the plants needs and leads (hopefully) to more successful grows for the grower.
RD