If those first two pictures are anubias the rhizome can't be buried otherwise the plant will die.
The last plant would benefit from root tabs though.
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I don't believe plant in the first 2 pics is anubias...the leaf structure is wrong & showing emersed growth..
Notice the new leaf growing up out of the substrate?
The old leaves look like contorted growth from shading by another plant..
Let's see a pic of its root structure plz...
I believe both plants to be swords changing from emersed to submersed growth..
sit in silence
When I bought them they were fully submersed. The roots look flat but spread out, kind of like spider veins. It was a pain to bury them. The tank is 24" deep and they kept wanting to float up. Here is a pic of one of them in a piece of driftwood.
View attachment 272995
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Your plant is definitely a sword...bury its roots in the substrate leaving the crown exposed,add a root tab&it'll be fine.
sit in silence
Oh, one more question. The substrate is Ecocomplete. How often should I add the root tabs?
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