Gravel and sand in the aquarium | Establishment | Blog | Garnelio EN
Help what the heck is happening in my tank? All the brown stuff of the sand and the plant leaves, this area is the most concented area of whatever it is. :
Amazon.com : AquaNatural Sugar White Sand 10lb Substrate for aquascaping, Aquariums, vivariums and terrariums : Pet Supplies
Purple/gray stuff on sand. | REEF2REEF Saltwater and Reef Aquarium Forum
Aquarium Gravel - Course Sand – Small World Slate & Stone
Stoney River Premium Aquarium Sand - White - 5 lb
Electric Aquarium Gravel Cleaner Automatic Water Changer Sludge Extractor Sand Washer Filter Pump For Fish Tank Vacuum Cleaner - Cleaning Tools - AliExpress
Sand is turning black. Should I be worried? : r/Aquariums