Hello Danny
For NitrAtes use Potassium Nitrate KNO3, and for Phosphates use Mono Potassium Phosphate KH2PO4, or Fleet enema...
I'm not sure if greg ships to the UK, I have sent him and email asking him just that, so will know soon. with a plant tank you want a target range of 10:1 ratio Nitrate to Phosphate.
http://www.gregwatson.com/products.asp?cat=8
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Originally Posted by danny
how do i get my nitrates up?? and phosphates i thought the idea was to have them at 0
the tank is 75 uk gallons
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