m0useanswered grow question 3 years ago for a KISS setup:
60-65% RH in veg/seeding
35-40% in flower
High RH in flower will cause bud rot in dense buds. It needs to be lower.
Nice use of a ultra sonic humidifier, I have one as well. Once the plants start to get bigger and respire more, the humidifier will not be need, they will keep RH around 55% on their own.
for lower increase the fan speed cycling air though the tent.
I add a bit of hydrogen peroxide to keep my humidifier clean as well
best of luck