hydroponics question (rockwool cubes)

alacn

Member
Im using a NFT system bought from here
http://www.somhydro.co.uk/product.asp?pid=1095

the problems im having is that my rockwool cubes are sitting on the top tray however i feel the 3inch rockwool cube just isnt big enough for my plant. Its only about 4 inches tool and already it seems like it needs to be put into a bigger medium.
I was thinking of just putting it in a soil pot but then that defeats the whole point on the hydroponic system, So what do i do ?

also one of my plants leaves are dipping so im assuming the rockwool cube is soaking up to much water? what to do ?

thanks
 
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