Trace elements are already present in your plant food, when you use food at full strength (5ml/ltr) your traces are present at maximum useful levels giving your plants the ability to take up any traces they need. Many people like to feed plants at a lower level than full strength, whilst in most cases this is absolutely fine it is possible that growth may be reduced due to the occasional shortage of a trace element. In order to avoid this risk we produce Extra Traces as a separate bottle, this allows those users who want to the ability to provide a reduced EC feed with traces at 100% the levels of as full strength food. When using ET add 1ml of ET for every ml of food missed out.
Example:
5ml of food…no extra traces.
4ml of food 1ml Txtra Traces.
3ml of food 2ml Extra Traces
You can also use Extra Traces alone at 5ml/ltr or with Root Tonic to give plants a break between feedings to prevent nutrient build up in soil/Coco. This will provide the plants with any traces they need to use, when using up any residual nutrients in the growing medium.