Walmart has Aqueon 9″ Medium Siphon Vacuum Gravel Cleaner for $3.51. Shipping is free with Walmart+ (free trial) or on orders $35+.
Thanks to Community Member BrianS13 for locating this deal.
About this product:
Makes routine water adjustments simpler!
Use up and down movement to begin water circulate
Removes soiled water and vacuums out the particles in gravel
6 foot versatile hose with clip for attaching the drain hose to the within of a bucket
Includes: 6′ versatile hose, self priming consumption tube and hose clip
Ideal for aquariums 15 to 35 gallons