I live in the UK and have a 54x24x24 very well planted freshwater
community tank.
3 x 36W Triton flourescent tubes 12 hrs/day
2 x 150W MH 6,500k 8hrs/day
Eheim 2217 Canister filter
Eheim 2329 wet/dry filter

With the exception of vallis and cabomba, the other 180ish plants
(mixed varieties) are barely growing, so I've invested in a
pressureized CO2 setup with pH controller which I will have in
operation by the end of next week.

I've been using Seachem Flourish, Flourish Excel, Flourish Trace and
Flourish Iron to help the plants along and there has been some slight
growth over the past couple of weeks - problem is the cost of these
additives - it cost £73 for enough of the above Flourish products to
last about 6 months, then I came across Greg Watson's site.....

As far as I can tell, I need to get hold of ingredients for Plantex
CSM+B which comprises-

1.5% Magnesium (MG),
1.5% Magnesium (cheleted)
0.10% Copper (Cu)
7.0% Iron (Fe - cheleted),
2.0% Maganese (Mn - Cheleted)
0.06% Molybedenum (MO)
0.40% Zinc (Zn - cheleted).
Boric Acid

A Google UK search for Plantex shows links to Greg's site plus some
others that sell weed-supressing membranes (!!??)
As I'm in the UK I doubt that shipping the chemicals from Canada is
going to be cost effective or allowed by Customs.
Rex Grigg's site gives some links to UK suppliers, but I can't find
the whole list of ingredients.

To make up the macronutrient mix I need-
MgSO4+7H2O (Magnesium Sulfate)
K2SO4 (Potassium Sulfate)
KNO3

Is it possible to buy the ingredients to make CSM+B and the
macronutrients in the UK or is there a 'UK alternative'?

The results from my Nutrafin test kit indicate -

Date Temp Time NO2 PH Fe Fe GH
KH PO4 NO3 NH3/NH4 Ca

chelated 15/07/2006
14.30 0.1 240 140 7
Tap water
15/07/2006 26.2 14.00 0.1 8 0 0 240
100 2.0 50 0 120 Tank Water
22/07/2006 28.2 13.00 0.1 8.2 0 0.01 240
110 1.5 40 0 90 Tank Water

I'm a little suspicious of the pH reading - the tap water here is
hard/very hard (acording to our water supplier) and comes up around
7.4.and a pH test strip (litmus paper) gives 6.8 (!) Matching the
colours on the nutrafin kit I guess depends partly on how colour blind
I am. I find that depending on the angle at which the test tube is
held against the colour matcher almost any shade of the desired colour
could be interpreted, so I wouldn't say the above readings are gospel.

Many thanks in advance

Pete