Silica 0-0-8 is highly concentrated and should always be pre-diluted least 10-fold with water before adding to the reservoir. Failure to do this may cause white particles to form when it is added to the nutrient solution. This problem is more pronounced at higher EC's especially when using hard or salty waters. Note, these white particles will normally dissolve if the nutrient is immediately stirred and is therefore typically only an aesthetic problem if treated correctly. If you do NOT want to predilute Silica, then it should be added to the reservoir first, before the base nutrient and other additives – like many other brands. The problem with this is it increases the water's pH – subsequent addition of pH sensitive elements will be potentially destabilized unless pH is quickly corrected.