I did about 5-6 soil grows (roughly 3 months each grow, 1 for veg, 2 for flowering). And one hydro.
For the hydro, I did a bubbling-bucket grow:
(nrabroad
mine, just a pic I found)
Had to add about 4-5 drops of 35% H2O2 each day. Kept my rorabroad
s crispy white.
But the hassle of monitoring the chemicals; easy to make a mistake and kill everything, lead me to go back to soil grows. So much easier.