Laith,
The lower the fish load/feeding, the lower the ratio needs to be. I feed lightly and have only moderate fish loads so I started witha ratio of 8.5:1 N/P I am now dosing ~20ppm N and 3ppm P a week, a ratio of about 6.7:1. HTis is a change that I have worked to over the past few months, mainly by just increasing my NO3 dosing to try to keep it from bottoming out. That is a good bit of P and I know that some might question this but I am mearly experimenting and learning. I am trying ot find my limits a my tanks limits. HTis is of course in one tank I have. The others are all different. Yours will not be like mine. The most important thing you cando for your plants, and to keep out algae is to make sure that CO@ is 30ppm and that your NO3
neverhits 0ppm. Keep these up for a couple weeks where they belong, dose P 1-2ppm a week and dose plenty of trace. Keep this up for 2-3 weeks thenif you want start playing with your ratios. The only resaon to adjust is to try and make your life easier, lower P means less N use, slower growth, less trimming, etc, as does lower light Tom
, or to try and bring out the red of plants like Ludwigia or Rotala, etc. by having a balanced lower N.
Hope that rambling helped
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