would a mars hydro ts 600 be a good light for a beginner like myself and would this be sufficient for just 2 simple autos in a 90x50 grow space and can i expect a decent yield from that ? i will be using fox farms (ocean forrest) soil and will go 18 hours on 6 hours off and will be going for fast bud auto gelato and another fastbuds auto seed havent made my mind up yet (please suggest).also if iam in a area with hard/very hard water do i need to purchase calmag or shall i purchase some instead to be on safe side. what sort of yield could i be looking at if anyone has a ruff idea from there experience. the only problem iam coming to is how do i feed my plants after the ocean forrest soil nuits begin to run out is ther a schedule for ocean forrest soil like a basic one with i have seen the fox farms schedule but looks a little complected and think to much nuits for a auto thanks for your help guys and i look forward to hearing your answers.