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Aquarium air equipment is an essential part of any healthy aquarium setup. Air circulation helps stabilize PH as well as provide necessary oxygen for respiration. Aquarium air pumps will also help give your aquarium tank a more dynamic look when used with air stones and flexible air diffusers. We carry a great selection of aquarium air pumps, heavy-duty linear air pumps, regenerative blowers, battery backup air pumps, air valves and fittings, and aquarium air diffusers.

At AquaCave, we offer some of the best selection & best prices on aquarium air equipment and supplies, Aquarium Air Supplies, Air Pumps, Diffusers, Valves, Tubing for you marine, reef and freshwater aquarium.

  • Anti-Vibration Pad, 6" x 6" x 7/8" Anti-Vibration Pad, 6" x 6" x 7/8"

    AquaCave

    Anti-Vibration Pad, 6" x 6" x 7/8"

    Anti-Vibration Pad, 6" x 6" x 7/8" These sound dampening pads work best with heavy external water pumps and large air pumps and recirculation blowers where there is significant vibration being transferred from the pump to the surface the pump is mounted...

    $12.95
  • EcoPlus Hydrovescent Air Disc 4" EcoPlus Hydrovescent Air Disc 4" EcoPlus Hydrovescent Air Disc 4" EcoPlus Hydrovescent Air Disc 4"

    EcoPlus

    EcoPlus Hydrovescent Air Disc 4"

    EcoPlus Hydrovescent Air Disc 4 Inches EcoPlus® Hydrovescent Air Disc® air diffusers are great for aerating or circulating nutrients in your tanks or reservoirs. These air diffusers incorporate suction cup feet to keep your Hydrovescent Air...

    $12.95
  • Hagen Marina 50 Aquarium Air Pump Hagen Marina 50 Aquarium Air Pump

    Fluval

    Hagen Marina 50 Aquarium Air Pump

    Marina 50 Air Pump by Hagen is a reliable source of delivering air for air operated items such as air stones, air curtains, air-actuated ornaments or for adding movement thus oxygen to any aquarium...Marina 50 Air Pump by Hagen.The Marina 50 air pump...

    $11.99
  •  5" Disc Air Diffuser   5" Disc Air Diffuser   5" Disc Air Diffuser   5" Disc Air Diffuser

    AquaCave

    5" Disc Air Diffuser

    5" Disc Air Diffuser Extremely durable and washable (reusable) air diffusing media. Manufactured with brown Adamantine Spar (corundum/alumina) under ultra high tempeature and pressure. Applicable in Acidic or Alkaline waters (low or high pH) Ozone...

    $9.95
  • 5.2" Cylinder Air Diffuser

    AquaCave

    5.2" Cylinder Air Diffuser

    5.2" Cylinder Air Diffuser They produce a bubble size of 1-2mm  and require a higher pressure. They have a molded aquere rubber support on each end that supports and protects them from tank bottoms and protects the tank or liner from the diffuser...

    $8.95
  • Nickle Plated Lever Style Air Valve 3/16" ID

    AquaCave

    Nickle Plated Lever Style Air Valve 3/16" ID

    Nickle Plated Lever Style Air Valve 3/16" ID For use with 3/16" I.D. tubing, 1/8" MNPT. Nickle Plated Lever Style Air Valve 3/16" ID For use with 3/16" I.D. tubing, 1/8" MNPT. Product code: 4341Item No. AE-VN22

    $7.99
  •  4 1/8" Disc Air Diffuser   4 1/8" Disc Air Diffuser   4 1/8" Disc Air Diffuser   4 1/8" Disc Air Diffuser

    AquaCave

    4 1/8" Disc Air Diffuser

    4 1/8" Disc Air Diffuser Extremely durable and washable (reusable) air diffusing media. Manufactured with brown Adamantine Spar (corundum/alumina) under ultra high tempeature and pressure. Applicable in Acidic or Alkaline waters (low or high pH) Ozone...

    $7.95
  • 4.2" Cylinder Air Diffuser

    AquaCave

    4.2" Cylinder Air Diffuser

    4.2" Cylinder Air Diffuser They produce a bubble size of 1-2mm  and require a higher pressure. They have a molded aquere rubber support on each end that supports and protects them from tank bottoms and protects the tank or liner from the diffuser...

    $7.95
  • 5 Valve Air Manifold

    AquaCave

    5 Valve Air Manifold

    5 Valve Air Manifold Material: Metal Aquarium & Accessory Type: CO2 & Ozone Equipments Type: Aquariums & Accessories Volume: 5L Application: air pump Length: 27mm species: Air check valve Dia: 4mm Valves: 5

    $6.99
  • Brass Valve 3/16" ID

    AquaCave

    Brass Valve 3/16" ID

    Brass Valve 3/16" ID For use with 3/16" I.D. tubing, 1/8" MNPT.Brass Valve 3/16" ID For use with 3/16" I.D. tubing, 1/8" MNPT.Product code: 4340Item No. AE-VBR1

    $6.99
  • 3.2" Cylinder Air Diffuser

    AquaCave

    3.2" Cylinder Air Diffuser

    3.2" Cylinder Air Diffuser They produce a bubble size of 1-2mm  and require a higher pressure. They have a molded aquere rubber support on each end that supports and protects them from tank bottoms and protects the tank or liner from the diffuser...

    $6.95
  • Fluval Pro Adjustable Air Diffuser, 2-Pack Fluval Pro Adjustable Air Diffuser, 2-Pack Fluval Pro Adjustable Air Diffuser, 2-Pack

    Fluval

    Fluval Pro Adjustable Air Diffuser, 2-Pack

    Fluval Pro Adjustable Air Diffuser, 2-Pack Compatible with all aquarium air pumps, the Fluval Air Diffuser is easy to install, quiet to operate and offers adjustable flow for customized bubble control, making it an ideal alternative to traditional air...

    $6.95
  • 4 Valve Air Manifold

    AquaCave

    4 Valve Air Manifold

    4 Valve Air Manifold Material: Metal Aquarium & Accessory Type: CO2 & Ozone Equipments Type: Aquariums & Accessories Volume: 5L Application: air pump Length: 27mm species: Air check valve Dia: 4mm Valves: 4

    $5.99
  •  Anti-Vibration Pad, 4" x 4" x 7/8"  Anti-Vibration Pad, 4" x 4" x 7/8"  Anti-Vibration Pad, 4" x 4" x 7/8"

    AquaCave

    Anti-Vibration Pad, 4" x 4" x 7/8"

     Anti-Vibration Pad, 4" x 4" x 7/8" These sound dampening pads work best with heavy external water pumps and large air pumps and recirculation blowers where there is significant vibration being transferred from the pump to the surface the pump is...

    $5.95
  •  Penn-Plax 5" Bubble Disc Diffuser

    PenPlax

    Penn-Plax 5" Bubble Disc Diffuser

    Penn-Plax 5" Bubble Disk DiffuserBubble Disk Diffusers create a circle of bubbles for healthy fish and a beautiful aquarium.Three sizes available...Penn-Plax 5" Bubble Disk DiffuserBubble Disk Diffusers create a circle of bubbles for healthy fish and a...

    $5.95
  •  Anti-Vibration Pad, 3" x 3" x 7/8"  Anti-Vibration Pad, 3" x 3" x 7/8"

    AquaCave

    Anti-Vibration Pad, 3" x 3" x 7/8"

     Anti-Vibration Pad, 3" x 3" x 7/8" These sound dampening pads work best with heavy external water pumps and large air pumps and recirculation blowers where there is significant vibration being transferred from the pump to the surface the pump is...

    $5.45
  • 3 Valve Air Manifold

    AquaCave

    3 Valve Air Manifold

    3 Valve Air Manifold Material: Metal Aquarium & Accessory Type: CO2 & Ozone Equipments Type: Aquariums & Accessories Volume: 5L Application: air pump Length: 27mm species: Air check valve Dia: 4mm Valves: 3

    $4.99
  • Elite Air Check Valve by Hagen

    Fluval

    Elite Air Check Valve by Hagen

    Hagen Plastic Check Valve - Accurate, leak-proof security - Protects air pump from back-siphoning damage - Prevents flooding during power failuresHagen Plastic Check Valve - Accurate, leak-proof security - Protects air pump from back-siphoning damage -...

    $4.99
  •  Anti-Vibration Pad, 2" x 2" x 7/8"  Anti-Vibration Pad, 2" x 2" x 7/8"

    AquaCave

    Anti-Vibration Pad, 2" x 2" x 7/8"

     Anti-Vibration Pad, 2" x 2" x 7/8" These sound dampening pads work best with heavy external water pumps and large air pumps and recirculation blowers where there is significant vibration being transferred from the pump to the surface the pump is...

    $4.95
  •  Penn-Plax 4" Bubble Disc Diffuser

    PenPlax

    Penn-Plax 4" Bubble Disc Diffuser

    Penn-Plax 4" Bubble Disk DiffuserBubble Disk Diffusers create a circle of bubbles for healthy fish and a beautiful aquarium.Three sizes available...Penn-Plax 4" Bubble Disk DiffuserBubble Disk Diffusers create a circle of bubbles for healthy fish and a...

    $4.95
  • 2" dia. x 4" Long Cylinder Air Stone 2" dia. x 4" Long Cylinder Air Stone

    AquaCave

    2" dia. x 4" Long Cylinder Air Stone

    EcoPlus 2" dia. x 4" Long Cylinder Air StoneThese diffusers are made from alumina that is heat-bonded. Use with 1/4" I.D. tubing.2" dia. x 4" Long, 3/16" / 3/8" outletEcoPlus 2" dia. x 4" Long Cylinder Air StoneThese diffusers are made from alumina that...

    $4.95
  • Air Check Valve - Red Air Check Valve - Red

    AquaCave

    Air Check Valve - Red

    Air Check Valve - Red   Fits standard 1/4" OD air line.Air Check Valve - Red   Fits standard 1/4" OD air line.Product code: 7752Item No. CO-AZ-CVR

    $4.95
  • 2 Valve Air Manifold 2 Valve Air Manifold

    AquaCave

    2 Valve Air Manifold

    2 Valve Air Manifold Material: Metal Aquarium & Accessory Type: CO2 & Ozone Equipments Type: Aquariums & Accessories Volume: 5L Application: air pump Length: 27mm species: Air check valve Dia: 4mm Valves: 2

    $3.99
  • Blue Durable air stone 12"

    AquaCave

    Blue Durable air stone 12"

    Blue Durable air stone 12"Inexpensive molded diffusers, 3/16" barb inlets. Blue Durable air stone 12"Inexpensive molded diffusers, 3/16" barb inlets. Product code: 4689Item No. AE-AA12

    $3.99
  • Plastic Valve 3/16" ID

    AquaCave

    Plastic Valve 3/16" ID

    Plastic Valve 3/16" ID For use with 3/16" I.D. tubing, 1/8" MNPT.Plastic Valve 3/16" ID For use with 3/16" I.D. tubing, 1/8" MNPT.Product code: 4339Item No. AE-VPL12

    $3.99
  • U-Shape Air Line Connector U-Shape Air Line Connector U-Shape Air Line Connector U-Shape Air Line Connector U-Shape Air Line Connector

    AquaCave

    U-Shape Air Line Connector

    U-Shape Air Line Connector Material: made of stainless steel, durable and can be used for a long time; Color: silver Suitable Tube Size: CO2 tube 4*6mm/air hose 3/16 ", fit fish tank glass thickness: less than 0.63" It can prevent the CO2 tubing and...

    $3.99
  •  Elite 4" Deluxe Bubble Disc

    Fluval

    Elite 4" Deluxe Bubble Disc

    Elite 4" Deluxe Bubble DiskBubble Disk Diffusers create a circle of bubbles for healthy fish and a beautiful aquarium.Three sizes available...Elite 4" Deluxe Bubble Disk. Bubble Disk Diffusers create a circle of bubbles for healthy fish and a beautiful...

    $3.95
  •  Penn-Plax 3" Bubble Disc Diffuser

    PenPlax

    Penn-Plax 3" Bubble Disc Diffuser

    Penn-Plax 3" Bubble Disk DiffuserBubble Disk Diffusers create a circle of bubbles for healthy fish and a beautiful aquarium. Three sizes available.Penn-Plax 3" Bubble Disk DiffuserBubble Disk Diffusers create a circle of bubbles for healthy fish and a...

    $3.95
  • Marina Millionaire Air Stone - 3 Pack Marina Millionaire Air Stone - 3 Pack

    Fluval

    Marina Millionaire Air Stone - 3 Pack

    Marina Millionaire Air Stone - 3 Pack The Marina air diffuser is ideal for adding bubbly highlights in your aquarium. Simply connect the air diffuser to your airline tubing and place it in desired location. Weigh it down or simply cover it with gravel...

    $3.95
  • Clic Clamp #59 - 2"  HangerLok Pipe Hanger, X88.59-LOK Clic Clamp #59 - 2"  HangerLok Pipe Hanger, X88.59-LOK Clic Clamp #59 - 2"  HangerLok Pipe Hanger, X88.59-LOK

    Hangerlok

    Clic Clamp #59 - 2" HangerLok Pipe Hanger, X88.59-LOK

    Clic Clamp #59 HangerLok Pipe Hanger, X88.59-LOK A great way to route your pipes and cords around your aquarium to keep them from shaking around. On the floor, wall, or overhead, these neat plastic hangers will make the job go fast and look great when...

    $3.79
  • Blue Durable air stone 8"

    AquaCave

    Blue Durable air stone 8"

    Blue Durable air stone 8"Inexpensive molded diffusers, 3/16" barb inlets. Blue Durable air stone 8"Inexpensive molded diffusers, 3/16" barb inlets. Product code: 4688Item No. AE-AA8

    $2.99
  • In-line Air Valve

    AquaCave

    In-line Air Valve

    In-line Air Valve Material: Metal Aquarium & Accessory Type: CO2 & Ozone Equipments Type: Aquariums & Accessories Volume: 5L Application: air pump Length: 27mm species: Air check valve Dia: 4mm  

    $2.99
  •  Elite 2 Outlet Air Control Valve

    Fluval

    Elite 2 Outlet Air Control Valve

    The Hagen Ultra Air Valve allows you to run up to 5 air driven products at one time. A flow adjuster on each valve enables you to control air output to each devise. The valves are leak proof and can be used with either fresh or saltwater aquariums.....

    $2.95
  • Check Valve by Won Brothers

    Check Valve by Won Brothers

    When pump is installed below water level, check valve must be in use in order to prevent the siphoning of water into the pump in the event of power outage.When pump is installed below water level, check valve must be in use in order to prevent the...

    $2.95
  • Blue Durable air stone 6"

    AquaCave

    Blue Durable air stone 6"

    Blue Durable air stone 6" Inexpensive molded diffusers, 3/16" barb inlets. Blue Durable air stone 6" Inexpensive molded diffusers, 3/16" barb inlets. Product code: 4687Item No. AE-AA6

    $2.49
  • Blue Durable air stone 4"

    AquaCave

    Blue Durable air stone 4"

    Blue Durable air stone 4" Inexpensive molded diffusers, 3/16" barb inlets. Blue Durable air stone 4" Inexpensive molded diffusers, 3/16" barb inlets. Product code: 4686Item No. AE-AA4

    $1.99
  • 1.25" dia. x 2.75" Long Cylinder Air Stone 1.25" dia. x 2.75" Long Cylinder Air Stone

    AquaCave

    1.25" dia. x 2.75" Long Cylinder Air Stone

    EcoPlus  1.25" dia. x 2.75" Long Cylinder Air StoneThese diffusers are made from alumina that is heat-bonded. Use with 1/4" I.D. tubing.1.25" dia. x 2.75" Long., 3/16" outletEcoPlus  1.25" dia. x 2.75" Long Cylinder Air StoneThese diffusers are...

    $1.95
  • Airline Clamp

    Azoo

    Airline Clamp

    Manufactured of tough plastic without sharp edges with 12-position ratchet control.Fits up to 1/4" ID tubing.Manufactured of tough plastic without sharp edges with 12-position ratchet control.Fits up to 1/4" ID tubing.Product code: 1448Item No. AE-DC10

    $1.95
  • 1" dia. x 2" Long Cylinder Air Stone 1" dia. x 2" Long Cylinder Air Stone

    AquaCave

    1" dia. x 2" Long Cylinder Air Stone

    EcoPlus 1" dia. x 2" Long Cylinder Air StoneThese diffusers are made from alumina that is heat-bonded. Use with 1/4" I.D. tubing.1" dia. x 2" Long, 3/16" outletEcoPlus 1" dia. x 2" Long Cylinder Air StoneThese diffusers are made from alumina that is...

    $1.69
  • BLACK Ozone Resistant Tubing, per foot BLACK Ozone Resistant Tubing, per foot

    Rio

    BLACK Ozone Resistant Tubing, per foot

    Ozone resistant tubing 3/16" I.D. x 1/4" OD It is very flexible and easy to use. BLACK Ozone Resistant Tubing, per foot Ozone resistant tubing 3/16" I.D. x 1/4" ODIt is very flexible and easy to use.Sold per foot. Product code: 4532Item No...

    $0.79
  • Blue Durable air stone 1"

    AquaCave

    Blue Durable air stone 1"

    Blue Durable air stone 1" Molded 1" diffusers,  7/16" in diameter., 3/16" barb inlets.       Blue Durable air stone 1" Molded 1" diffusers,  9/16" in diameter., 3/16" barb inlets.       Product code: 4343Item...

    $0.69