Nylon string aquarium safe?

UNS Foresta Line - Moss Thread — Buce Plant

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SunGrow Moss Cotton Thread, 20 Meters, Dark Green Color Similar to Willow Moss, Dissolves Eventually, Securely Attaches Floating Plants : Patio, Lawn & Garden

NYL-S - Aquarium Supplies - Nylon Filter Bag Small 3 x 8 With Draw String - Blue Ribbon Pet Products, Inc.

26 Best Low Light Aquarium Plants For Your Tank 2023

Blue Ribbon Pet 100% Nylon Filter Bag with Drawstring Top for Aquarium Filtration - (4 x 12)

Is string safe to use in an aquarium? I got this ship from PetSmart and it came with string but it's gotten black on parts. Anyone know what this is? : r/Aquariums

Nylon string aquarium safe?

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