As all grow rooms are different we have not included ventilation, although we must stress it is highly important to have a good airflow in your grow room, Please feel free to browse through our Environment section
1) Active Hydroponics - The nutrient solution is delivered to the plant with the aid of a pump. There are four main types of active hydroponic systems, NFT Ebb & Flood, Drip Irrigation and Aeroponics.
2) Passive hydroponics - This is the cheapest and simplest method of hydroponic gardening. It is ideal for beginners with very little outlay. This method works by capiliary action. A plant pot is filled with a growth medium i.e. perlite, then a saucer is placed underneath the pot which is then filled with nutrient solution.
Conductivity is a measurement of the strength of a nutrient solution (dissolved salts).