Air pump with an inlet connection

[GregOyeah]

Anyone know of an air pump that has an input connection as well as an output connection??

I want to put an air stone in my sump, but I want to use outside air to feed it to assist with ph, so I want one that has a connection for a tube that I’d run outdoors then obviously the other that I’d connect the air stone to.

I can only seem to find ones that use just the ambient air where the pump sits

 

[Montiman]

Coralife super luft have an air inlet but they are crazy loud. Before I moved I used one for the same purpose you are interested in. It worked well.

 

[LobsterOfJustice]

Aqua lifter pumps are typically used to move water, but will also function as an air pump just fine.

 

[Paul B]

I just drilled a hole in mine and glued in a tube. Close off the existing input hole on the bottom with a glue gun or tape

 

[Sod Buster]

A Tom's aqualifter. That is the most popular in the micro/nano bubble scrubbing thread. Do you have a skimmer in the sump? You can also run a line off that outside for the same effect. Some people get pretty creative if they have a apex, like 1/4 dc ball valves to bypass CO2 scrubbers and such. They can usually keep the PH within .2 of the target over 24 hours.