02-20-2012, 11:48 AM
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I would actually say fertilizers are light, but it depends on how many grams are mixed in with those two cups. When I mixed and dosed liquids I added like 20mL to my 55 daily. I used individual mixes though not a comprehensive as I don't dose 1:1:1:1 ratios. I dose all the same fertilizers though, plus some others. My tank also runs high tech, but I agree your light is really high. Your light is double mine, maybe a little less. I use a high efficiency fixture on my 55 gallon. It runs only 2x55 watt power compacts, tank also runs pressurized CO2.
Your fertilizer mix is also missing a phosphate fertilizer, which I can almost guaranty is gonna be limiting if you are not adding it at those light levels. Also what are nitrate levels in the tank? And plant density/growth rate? Also how old is the tank?