I second that! You have water just tailor-made for soilless or hydro IMO.
So let me rant for a second 
when you grow indoors, everything is secondary to good light. Without decent light in the correct spectrum you will grow lanky, loose, airy, unhealthy flower and will be chasing nute burn throughout the grow.
Now that I have you attention: light is the engine that drives all processes. With adequate light, the plant will maintain a healthy rate of photosynthesis, sugars are produced which are then used to make flower, due to healthy metabolism the plant will uptake nutrients at a much higher rate and not get nute burn because the plant is using the salts.
Now that said, you can’t cheap out on lights. In general, if the light is ‘blurple’ it is not something very desirable. That’s about 15 year old tech. Companies like Horticulture Lighting Group, CHILled Logic, California Lightworks and a few others produce lights using the latest ‘top-bin’ diodes with simply amazing properties. Expect to pay $1 per watt for these lights. The good news is these lights are so efficient that you draw just about half what the blurples do. This is a long thread and you may want to skim, but extremely worthwhile reading:
Spend some time on this forum and you will gain a wealth of knowledge before spending money.
Following someone like @Hellraiser would be beneficial too.