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Re: Beware to much iron
This post illustrates two important points. First, micronutrients have an
extremely small range of 'sufficiency' ... too little results in
deficiency symptoms and too much results in toxicity. Any micronutrient
mixture should, therefore, be added cautiously. Secondly, test kits in
general are just not sensitive or accurate enough to pick up small
changes in nutrient levels (no matter what the kit you are using). If you
want to ensure continued healthy growth then look to your plants! They
will tell you if something is wrong in your tank ... I know this is more
dificult than the comfort of a color change in a test tube but in reality
it is the only method that will work consistently (its also a lot
cheaper).
dave.