- Check nutrient conductivity (EC) – Is it too low? If so, adjust it accordingly
- Check the pH – Is it between 5.8 and 6.2? If not adjust it using a pH UP or pH DOWN solution.
- Is the nutrient solution aerated? – Are you using an airstone or waterfall technique? If not, address any problems
- What is the solution and/or substrate temperature – Is it correct for proper root function?
- Are roots pathogen and disease free? – They should be white and alive
- Is the nutrient solution correct for the type of crop and the hydroponic grow system in use? – Total loss nutrients are different from recirculating hydroponic grow system solutions, even for the same crop.
- How long has the nutrient solution been in use? – Nutrients in the solution get used up at different rates, this in turn can stop other nutrients becoming available to the plant – Sound like you? – Dump the tank
- Is the EC due to salt build up at the expense of nutrients?
- Is the humidity at an acceptable level?
- The problems may be nutritional – Check for deficiency symptoms
March 4th, 2010
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