Distilled water with bloom formula

Is this recommended or should I use normal water?

Also, how often should I use blooming formula?

ya it is good to use,not neccasary though if you have good tap water anything around 200 ppm,you can use blooming formula in flowering every watering if you like as long as you do not use high amounts and you make sure it runs out the bottom so you dont get a build up of salts,or make sure you leach your soil every now and then.

leach my soil?

what is that?....sorry, im a complete noob at this

you run clean water through your soil to get rid of the salts that builup in your soil over time.then you apply your nutes,and make sure your ph is on or you could be in for a painful experience.