I also use Mad Farmer silica shield during veg only along with House and garden's Roots Excelurator. A dude at the grow store said house and garden is great for huge yield, but slightly lacking in taste so he gave me a free sample of an Mad Farmers Moab to use for the last few weeks of flowering to give a little boost. During very young seedling and clones stages I have been also using superthrive. I water with Denver city water, no filtering. My favorite way to get roots started for clones is with a bucket of water with a air stone, with foam boats for my clones, when roots are big enough, I put them straight in to coco, and it works great