Never Trust a RIO Pump!

[Jacoda]

I've tried a Mag7 on my T1000, it's a bit overkill but it works.

Needlewheels by default don't draw a lot of water so a large pump such as Rio 2100/2500 is required, I believe a Maxijet1200 will be a good choice as long as it has enough strength to pull air in from the T1000's venturi input, and let the impellers chop up the bubbles.

To be on the safe side I would use a Mag5 when the impeller dies in my Rio 2500.