Partially block skimmer to create aeration - bad idea?

[loopy123]

Anyone know if it is a bad idea to partially block the skimmer to create aeration/CO2-degassing?
The pump seems OK with it (i.e. not hot or making noises) and I get the desired aeration bubble coming out the return jets.
I guess cavitation could eventually do damage, but I was thinking this is short term to adjust my alkalinity.

Thanks for any feedback or experience with this!

 

[IceShadow]

I'd be worried about the pump running dry. Typically I see people just point the returns up toward the surface to aerate.

 

[loopy123]

Thanks for the reply. I think the Intelliflow pump will shutdown if it goes dry and report "Failure" - so I think I might be Ok there.

 

[duraleigh]

Welcome to the forum

Bad idea. You have essentially created a suction side air leak which can pressurize the filter and be troublesome. The skimmer should NEVER be allowed to suck in air.