What grow medium should I be using for hydroponic system????

I recently decided to set up my own hydro system for the fun of having a winter project, however... my darling little seedlings which progressed nicely into the veg mode are showing definite signs of stress. (I feel like I'm a child abuser). The typical browning and yellowing of the veins and leaves, lower leaves with dark spots on the edges.

I know it could be a plethora of issues such as ph, over nuteing, etc... I also know that this will be trial and error until I get the right formula figured out but ---- I can't help but think that it has something to do with the basics such as my growing medium.

I am trying to do a hydro system starting with the a drip irrigation for the veg state. After germinating some random seeds in my Aerogarden for three weeks, I transplanted several of them into 3 gallon pots using something I found at the local garden center called Shultz aquatic plant soil (tiny kiln dried clay pellets). It states it is ph balanced blah, blah, blah. I could not find any of the hydro pellets around here, so I improvised.

Soooo, I just flushed out the system with phd, distilled h20, cleaned my resevior, and added the 1/2 strength nutes with 5 gallons of distilled h20. Water temp is approx 72 degrees the room is 70 degrees, lighting with two cool and two warm cfl bulbs. Iam trying to be meticulous as far as cleanliness, no bugs so far.

Has any one heard of this type of grow medium for hdroponics????

you need to get hydroton rocks google it thats what you need

yeah i have the clay pellets and they work amazing....you just can't over water with them. mine is in a ebb and flow system and i had the same problems you are having. best thing to do is change your resevoir water atleast once a week. that keeps your nutes from burnin your plants as the water evaporates. pics would be a big help so we can see what kind of system you are working with.