Hello. When you first get into planted aquariums you assume that if you buy a Liquid plant fertilizer it should be enough for your plants, After reading the "Estimative Index" it mentions Nitrate, Potassium, phosphate, magnesium and iron. When i looked to see what Plant nutrition+ contains, it only contains "N" and "P", is this enough or would i need to buy another fertilizer so my plants get the full range of nutrients? or would be it a cheaper to switch over to dry salts? or should i use dry salts along side plant nutrition+? Any suggestion or criticism welcome Thanks in advance Darren.