IMO, you need both liquid and tab fertlizers. Some plants prefer to get
nutrients through their leaves, some prefer to get it through their roots.
Swords are notorious root-feeders. Most of your other plants don't have strong
roots.

Hygro is a fast-growing plant and, IME, is the first to show deficiencies. But
if you don't fertilize, the rest of your plants will eventually be affected,
too. Consider the Hygro the canary in the coal mine. Don't try to fertilize
just the Hygro. All your plants need fertilizer. They just aren't showing it
yet.


Leigh

http://www.fortunecity.com/lavender/halloween/881/