I used too, following some other posters and others it worked I didn't see any ill effects cept that the tops yellowed faster as they dry somewhat. I thought "what if" and kept it at the bottom of the net pot through the entire grow. No ill effects cept the roots now were all white.. I guess that a plus. So I stopped it and kept the water at net pot bottom. In flower in my 2.5 gallon buckets the plant will drink half the water in a day so it will be 2-3 inches below net pot on refilling, I have let the plant go 48 hours without refilling and it makes it with no ill effects except the plant is usually sitting in a 2.5+ EC solution where it should be at 1.8EC. Replacing water fills the water and lowers the EC as well, so this is how I know if I need more food for the plant. I start at 1.8EC for full bucket up to net pot, then as I fill I take a EC reading first if it is 1.7-1.9 I replace with more 1.8 solution in a gallon jug I keep. I have one 1.8EC gallon container of nutrient solution and one gallon of regular RO water. If it is higher then 1.8EC then it gets water only, and anywhere in between you have to guess it and measure. I mean sometimes I need a bit of the 1.8EC solution and mostly water like the EC is 1.6 now, I need the 1.8 but if I pour all 1.8 in the end EC will be above my range. So it takes some getting used to but it works for me I guess, maybe that will be my next process to tinker with. I like to do one at a time, and the drying/curing was my last one and I think I got that nailed.
Peace.
I am thinking this is why I get burnt tips on the plants as the plant drinks the EC goes up sometimes and it has a higher EC then I need or want, so I might go back to 3.5 gallon buckets as the plants even in 24 hours are sometimes sitting in high nutrient solution that *if* I can not get to them in 24 hours they are not in danger of bruning the @!& up and keep the EC more stable for better readings. I like the roots get air for periods of time so its a what is better for me in the end.