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Sharpy I have yet to see blanket weed die off due to a veggie filter. In truth the BW will thrive at levels that cause all the plants in a veggie filter to die long ago.
As part of an experiment I spent one summer doing 30% water changes a day. My reasons for this were many but one of the things I wanted to see is whether or not this would kill the terrible BW problem I was having. At 30% a day my nitrogen values were almost unmeasurable but my BW grew like crazy.
The causes of BW are varied and the reason it comes of goes are often nothing more than guesswork. Without a massive lab workup on a regular basis it is very difficult to pinpoint the exact cause/remedy
Veggie filters have other numerous drawbacks and I avoid them at all costs.
If you have found a system that keeps your BW at bay then bravo, just don't cheer to soon. If it is still gone in the summer of 2007 then you might consider popping a champagne cork but don't rush it.
B.Scott
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Semper in excreta, sumus solum profundum variat
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