just wont grow...

ive got a rooted clone about a month old... it took nearly 3 weeks for it to root... so last week i moved it to a DWC under my 400 hps... and it hasnt growin an inch... nutes are at about half strength and ive got 4 air stones for the one plant... ph isnt to bad.. i dont let it get much higher than 6.5

any sugestions as to what could be wrong?b

lower ph to around 5.8 to 6 at the highest. what is your water temp? air temp? humidity? ppm? alot could be wrong

wouldnt ave a clue about water temp or ppm.. air temp is mid 70s maybe up to 80 on a hot day... humidity is about 30%

Give it a bit more time...Not all plants just explode when they hit the water. It may need to aclimate itself a bit 1st. Its only been a week in the DWC.

How did the mother plant grow?