Fits standard aquarium airline tubing

Aquarium Airline Anti-siphon Check Valve
1/4 Drip Line Fittings found in your lawn and garden department work just as well on your 1/4 standard airline hose for your aquarium. They take a little more effort to get on, but at 1/3 the cost, I hope you agree it's a sweet little tip to save some money!

Also, Petco is running it's $1/gallon sale, so go grab a tank or two before July 27th if you've been waiting. Do you own an aquarium? Would you like to help support this channel? Subscribe to My Aquarium Box to get the world's first subscription box for aquarium hobbyists delivered to your door once per month:

Coupling to connect two aquarium air lines together.
A quick video showing how I hid the air line.

55 gallon planted aquarium update:

New sunsun filter, aqueon led light, and live plan: Aquarium Airline Holder/Separator by MS3FGX is licensed under the  license.Aquarium Airline Plug by MS3FGX is licensed under the  license.Aquarium Airline Coupling by MS3FGX is licensed under the  license.
What frustrates me are these aquarium ornaments such as bi-valve clams which are supposed to open and close when an airline is connected to their attached stem and then to an air pump, but the ornament doesn't work. It just sits there and does nothing, despite having air pumped into it.Air lines can easily become water lines. Although there was no siphon when I went to bed, it formed anyway. Keep your air lines (and air pump) above the aquarium! In the 5 hours I was asleep, 2-3 inches of water siphoned out of my 1 ft x 2 ft aquarium. That's 2.5-3.7 gallons of water. Accounting for gravel, that's about 17% of the water. If this had happened on a weekend that I wasn't home, my fish would have been dead, and my computer equipment would have been destroyed.6. Install Air System - (see illustrations with pump) hang gang valve on top edge of back of aquarium. Cut section of airline to go from sponge filter to nearest vertical valve spigot and attach. Attach airline to airstone and place airstone in back corner opposite sponge filter. Trim airline and attach to next vertical valve spigot. Use remaining airline to connect air pump to horizontal valve spigot. Cut airline approximately 6 inches from pump and insert check valve. (Check valve only allows air to flow in one direction - check by blowing into it.)This is a two piece bulkhead that can be used to pass a standard size aquarium airline through a thin walled vessel. I use it to pass airlines through the walls of algae reactors, but the same concept could be used for other tasks such as hydroponics. The thickness of the wall of our air line tubing is 1mm, 25% thicker than the cheap tubing in the market. Our tubing can bear higher pressure than the cheap ones. It’s very important in case of high-pressure application, like in a deep water aquarium or CO2 system.This holder can be used to organize and secure aquarium air lines, hole in center can be used to mount it to a flat surface.
Some brands of hose fit fine, but others are just thick enough that you may want to push the hose through it lengthwise than trying to snap it down from the top.
UPDATE 8/15/14: Wall thickness increased to prevent breaking while pushing hose through. Should be much stronger now.No more do you have to look at ugly airline tubing defacing your aquarium! This green airline tubing is cleverly disguised as a beautiful green Cabomba plant. Uses low buoyancy miniature air-line tubing, with no loss of air output efficiency.Measure the lengths needed from the gang valve to the air-powered features. Cut the needed lengths in the air line tubing, adding some extra length for slack. Attach the tubing to the outlet pipes of the gang valve and the aquarium features.