Compact cfl grow tent ( 1st time grower!)

This is my first attempt at growing the green !
Mistakes have been made in the 18 days i have been "up & crawling" but i think that i am gradually getting the hang of it.
The 60x60x140 grow tent that i have seemed to be a relatively good grow space, however i was very wrong !! I will be upgrading , during this journal..
I have 1 "Double Cheese" on the go at the moment as that is all that can fit in the tent ! & she seems to be going very well under the 125 watt Phytolite 6500k, just topped her today so i guess that will slow the growth for a couple of days.
I have an in & outlet fan as well as a fan pointed at the plant itself so the temp is always stable at 80 .. PH is at a steady 6.3 most days & i water 3 time a week twice with 1/2 strength "Canna" terra veg nutes.
She is in a 3.5ltr pot at the moment consisting of a mix of canna terra pro mix , worm castings , guano, perlite, clay pebbles. & will transplant in a couple weeks for flowering..

Any response or tips will be most welcome.........