MP40 - Dumb Query

[redfishbluefish]

I've had MP40's for a couple years. I clean the wet sides whenever I find the time....maybe every three months.....I know, not frequently enough. Never really paid attention to how I put the cleaned wet-side back in the tank.....just threw it in there. Well, I cleaned the wet sides tonight and wondered if it mattered how the powerhead was placed. MP40s have a portion of one side "blocked" off.






The rest of the powerhead has those "vented" ribs.


So do you place this "blocked" portion in a particular postion? When I put these back into my tank tonight, I put the "blocked" portion facing down. Does it matter, or am I an idiot even bring this up?

 

[jduck]

Normally it's up to prevent it from sucking in air and making bubbles

 

[KorL]

I usually placed the blocked off area facing upward. Useful especially if you place the pump closer to the surface helps prevent air from being sucked in

 

[hybridazn]

Normally it's up to prevent it from sucking in air and making bubbles

+1

It's there so that way it doesn't create the little "vortex" of air being sucked down from the surface