Both have a place — here's the trade-off.

Live plants improve water quality by consuming nitrates, give fish cover, fight algae, and look stunning. Easy ones like anubias and java fern are nearly foolproof.
Silk and plastic plants need zero care and never die, but they don't filter the water or help fish behavior — and cheap plastic ones can tear delicate fins.
Many tanks combine hardy live plants with a few silk pieces. If you want a low-effort tank, choose live low-light plants — they're easier than people think.
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