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I intend to start using dried ferts to dose my aquarium. I have purchased the micro nutrients but havn't started using yet. I know I will have to buy some dried macro nutrients as well. Since adding plants several months ago, the phosphate and nitrate readings are almost zero and the tank has started struggling with hair algae. What are the main macros I will need to get a good balance for a 55 gallon freshwater?
 

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KNO3, KH2PO4, K2SO4. You might as well check your water quality report while you're at it; some people get a good portion of their NO3 or PO4 this way. It may also turn out that you need Mg or Ca.

-Philosophos
 

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You may want to get some of Seachem's Equilibrium or a GH Booster since your water is soft. These add Ca, Mg, K, and some also add Mn and Fe.
http://www.seachem.com/Products/product_pages/Equilibrium.html
http://www.bestaquariumregulator.com/ferts.html
http://aquariumfertilizer.com/
http://www.greenleafaquariums.com/aquarium-fertilizer.html


Some dosing plans don't include K2SO4 because you may get enough K from KNO3 and some K from the GH Booster. I've found that I need to add K2SO4 sometimes.
http://www.plantedtank.net/forums/fertilizers-water-parameters/21944-_dosing-regimes_.html
http://www.barrreport.com/estimative-index/2819-ei-light-those-less-techy-folks.html
 
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