Hi Roy, thanks for emphasizing that it is the emerging leaves that, hopefully, will now darken as you described. In reviewing images from the web, I can see how comparatively light colored the leaves are of my anubias. I suppose that I partly got away with the relative lack of iron in the water due to the root tabs containing ferrous gluconate. Then the arrival of the bladder snails. These bladder snails have outstayed their welcome and are being shown the door. The mystery snails stay on the bottom leaves of the anubias and on the cryptocoryne, and they don't travel on the java fern.
On another note, another problem. In a different tank, a 20 gallon high, I've been unable to prevent the algae from growing on the plant shown in the image. I forget the name of the plant. This plant was growing great guns, with delightful pink leaves on top and then, the dreaded algae struck. I think it's hair algae. This is the only plant in the tank. I wanted to make sure that I didn't get algae before planting additional plants and this plant was growing well. To try resolving the problem, I lowered the amount of light (to "40" on Hygger, don't know how many lumens this represents; 100 is maximum brightness) and the time of light is 8 hours per 24 hour. The plant grows and then, still, is overwhelmed by the algae. I greatly trimmed the plant, down to a couple inches, such that no visible algae remained, but the same story occurred. This is a community tank containing a fat nerite snail, two otocincluses, a panda catfish and an albino catfish, a golden Chinese algae eater, two clown-faced plecos and a few assorted top and middle water column eaters. What to do? In terms of non-live adjustments, cut back more on the light and/or decrease food addition? I have not fed this plant root tabs and I do not use Easy Green and Easy Iron. The plant was doing fine even without these supplements. On the live adjustment side, maybe try a Florida Flagfish- although I read these are too aggressive for a community tank, a different type of snail, a Siamese algae eater?
Thanks again.