Mystery Strain 3 week clone

Everything is going well with our big girl, switched to ph treated tap water which seems to be working well. It comes out of the tap at 7 ph and around 80 ppm. I have used lemon juice to get it around 6.86 ph after mixing in my nutrients. 2/11- Very hard to water big girl as she seems to be drinking really fast and theres not much room; i'm having to water everyday. Not sure how long i'm going to veg but starting to worry about height for flower in my 3x3