1St auto Grow

Humidity been a bit high this week as we’ve had a few days of typical English weather , managed to keep the humidity between 48-65 but mostly 50-55 with temps at 21-24c Still using Canna A+B about /4 ml of each per liter Switched from Grow to Bloom (Bio Bizz) Nearly had a accident , anyway I heard a loud bang went and checked inside the tent ( lucky I moved two other plants out of there as they are in flower) and the fan had drop disconnecting from the filter and dropped to the floor I think I may need to by those fast clamps , is there a sleeve I could get slightly large then the 4inch opening of the fan and filter and then just use the smaller/thinner clamps with the screw (basically a reusable metal cable tie) Thankfully it didn’t land on this auto plant ! 😆 Saturday 12th added a few more pics of the progress and growth