Water temps can make a big differance on how long it will take. I had a strain I couldn't clone in soil, only ones I got to root took 30 days. I built my Bubble cloner and got roots in 14 days the first time, 10 ten days was the fastest this time round, although the lonest was about 21 days. This is with water between 72-78, no nutes in the res, dome gave me mold also so I don't use one anymore. Root powder had better success.