The picture is small, but those don't look like healthy roots to me. My first question would be what's the nutrient temp? Also I don't know much about your aeroponic setup, but 2min on per hour for a aeroponic system sounds like the roots would probably be drying out between watering's. Lastly I'm not familiar with those nutrients but are you sure they are for hydroponics? I only ask because I did a quick search for them and even though they were listed on a hydroponics site they mention "Soil Bloom" and "Soil Grow."

Cellmax Mega Pack CELLMAX SOIL

Hi homehydro,

thanks for the reply.

I was using cellmax hydro grow for hard water. The roots does look dreadful. the nutrient temperature is about 21-24 degrees and does not change much since the set up is indoor. apart from the LED lighting, there is no natural light.

the set up is not true aeroponic. I have my dought about how good the system is. it is just a water pump of normal pond type and 4 spray nozzles, similar to hozelock 180 degree microjet.

Just read from another post say lettuce does not like LED lighting. and also equivalent LEDs powers are normally over rated. I may had the worst of both situation in my set up, not enough light and wrong plant for the type of light.

I may have another try for different plant/vegetable and lower the light a bit to cover less area.

thanks.

daniel.

hi just been reading your post i own a hydro shop and have a fair knowledge accross the board.your roots have died due to being exposed to,to air and light,when using aeroponics you should leave the system turned on 24 hrs a day as the roots need constant supply of water nutrients and air for them to grow as there is no media involved to aid this.light is a very important factor too more light more yeild from your crops 600w hps will give you enough light to cover 1.5 sqm and give you amazing results if you get the aero system running correctly you will also be amazed how much your plants produce.hope this helps also keep check on your ph and ec levels,happy growing.