I just got the 100 model of the Algae-free SureGrip magmounts for Seios, MaxiJets, and Tunze streams. I am using mine with a Tunze Stream model 6000. So far, so good. Pros: SMALL footprint -- about 1/2 or less the size of Tunze's own magmount. CHEAPER ($35) than Tunze's mount for 3/4" thick glass ($47-51). STRONG magnets -- seems to be just as strong as the Tunze mount. Can be used for 3 different powerhead types with the supplied brackets. Much more readily available than Tunze's -- those are almost always backordered. SO MUCH BETTER than junk suction cups provided for MaxiJets & Seios. Cons: None.