People are saying it can't be done
IM gonna prove you guys wrong with science
Things you will need:
An air pump
A few feet of pvc
A check valve
1 90 degree pvc fitting
1 45 degree pvc fitting
Some airline tubing
2 or more suction cups to hold the airline tubing
Assemble the pipe
It should be shaped like this
The slash is the 45 degree pvc fitting
The three periods are the 90 degree pvc fitting
The wavy dashed lines are the water
And the single periods are the pipe itself.
Attach one of the suction cups to the airline tubing
stick it on the inner wall of the 45 degree fitting, making sure the end of the tubing goes past the bend, but not more than an inch past it.
Cut the airline tubing, and attach the check valve to it. This is a precaution so the water doesn't go up into the pump.
attach the other suction cup to the wall of the aquarium. This is optional, but it keeps it neat and organized
Attach the end of the airline tubing that is behind the check valve to the air pump.
Place the apparatus so the end of the the top pvc fitting comes out of the mouth of the waterfall. The 90 degree fitting can be removed if you wish, because it may look ugly and not natural for a pipe to be coming out of the top of your waterfall.
If you want you can decorate the discharge side with moss, and putting bio rings in the pipe will also provide a place for beneficial bacteria to colonize, and munch on the nitrates. The air rises, creating a vacuum, thus putting water displacement to use.
I use this method on my 10 and 20 gallon shrimp tanks to cycle the water between the two so I don't need to tend to them as often.
do u guise even diy???