Fast buds DWC

Been awhile since I did a DWC autoflower grow as have been doing feminised seeds in autopots last few years but thought I would get the dust off these buckets and do a quick run, not expecting stella results as before when I was doing DWC my tent was indoors in my house and it was quite easy to keep temps stable but now I'm outside in a shed which makes it a bit more difficult, this week we had a bit of a heatwave so temps have been in high 80's to 90F, also seems like hydroguard has been banned in the UK as can't get hold of it anymore and used what I had in the 1st buckets I filled so it could be a root rot disaster but we shall see!