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Re: [APD] Re: H3PO4

>>The high PO4 alone will get rid of Green spot as I've suggested for a
>>number of years now. 

>What would be usefull, I suspect, is a chart similar to this:

>If you have...          you're short on 

>green spot              phosphate

Well there's more to it than that alone, but it is a large correlation.........

Tom Barr 
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