Yes, I am using the Flourish products to fertilize. I'm not too strong with math or chemistry to figure out dry ferts and EI stuff, but the Seachem dosing chart gave me a starting point that seemed less intimidating to me.
The substrate in the original tank that cracked was small gravel mixed with eco-complete and some laterite and peat moss thrown in for the bottom layer. That was topped with more gravel. This all got mixed together and thrown into the new tank, and then topped with some more new gravel. I am also using Flourish tabs, and some spot fertilizing.
The plant in front is a red tiger lotus (Nymphaea lotus). It has been trimmed back a bit.