Or whatever the in-the-gravel fertilizer sticks are called? I have mostly stem plants that get uprooted and replanted a lot, so I figure No. But I also have a crinum calimistratum, cardamine, isoetes, hairgrass, and glosso. I dose KNO3, PO4, KCl, Flourish and Flourish Iron. My substrate is maybe 40% Flourite. any need for fertilizer sticks anyhwere?