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Re: [APD] 10,000K CF

Phosphate in your water supply might be enough if you changed a large  
percentage of the water every other day.  Like other fertilizers the  
plants use up what's in the water, so for high light intensity like  
you have, it is necessary to keep replenishing the fertilizers,  
including phosphates.  If you look into the Estimative Index method  
for fertilizing, at http://www.barrreport.com/estimative-index/, you  
can find out how much of what fertilizers you should be dosing.  This  
isn't the only way to fertilize, but it is a simple, almost foolproof  
way to do so.  The phosphate source many of us use is mono potassium  
phosphate, KH2PO4, which you can get very cheaply from Greg Watson at  
http://www.gregwatson.com/proddetail.asp?prod=PotassiumPhosphate.  I  
suspect this will fix your problem, but once you do that you will  
need to increase the amounts of other fertilizers you use too, since  
the plant growth rate will increase so much.


On Jan 19, 2007, at 4:08 PM, fixingahole at ftml_net wrote:

> I tried adding nutrients, throwing in practically everything Seachem
> makes. Flourish, Flourish Excel, Flourish root tabs, Flourish  
> nitrogen,
> iron, and potassium, and Trace. Also, I tried every fertilizer
> separately so that I would know what had the best effect. All I got  
> was
> more algae and no better growth, although the iron did seem to make  
> the
> plants a little red. That's why I thought that something else was the
> limiting factor. As for CO2, it's the same automated system that  
> was on
> the old tank: 5 gallon tank, external CO2 reactor, small Eheim  
> pump, and
> Milwaukee controller. Ph is about 6.7. The plants pearl very nicely
> under all that light.
> There's phosphate in our water supply. A saltwater guy who tested the
> water was horrified at the amount. But I realize that freshwater is
> different. Could the plants possibly be using all that phosphate and
> need more? What phosphate additive did you use?
> Thanks everyone!
> Amy

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