fair play for trying it, they really do grow shockingly quick as a dwc, as soon as them roots hit the res the plants and the roots grow like crazy,
im sure you will be happy with the results. with the one without the air stone just make sure the water dont sit to long without any oxygen in it, at first the plant wont use all the water in the res, so what i do is use a spray bottle and every 2 days give the liquid in the res a good squirt to put some oxygen in the water, also watering through the top part creates oxygen, once the plant is big enough it will empty the res in just over a day so you wont need to do this once you get to this stage,
i never tried just leaving the water but it might be ok, i just never took the risk and made sure i put oxygen in it every 2 days, i never had any problems so ill be using that method again till the plant and roots can take all the water
im sure you will be happy with the results. with the one without the air stone just make sure the water dont sit to long without any oxygen in it, at first the plant wont use all the water in the res, so what i do is use a spray bottle and every 2 days give the liquid in the res a good squirt to put some oxygen in the water, also watering through the top part creates oxygen, once the plant is big enough it will empty the res in just over a day so you wont need to do this once you get to this stage,
i never tried just leaving the water but it might be ok, i just never took the risk and made sure i put oxygen in it every 2 days, i never had any problems so ill be using that method again till the plant and roots can take all the water