Recommended pump for MRC CR-4 Calcium Reactor

[Macro1]

I have a My Reef Creations CR-4 calcium reactor and I would prefer not to put the blue line 20hd pump on it as it hasn't gotten the best reviews.

Blue line 20HD
Max GPH: 450
WATTS: 45
Amps: .4

Any suggestions?

 

[Macro1]

I do have a mag 7 I was thinking of using but I'm not familiar enough with calcium reactors and I don't know if the head pressure of the mag 7 will be enough for it. Any thoughts would be greatly appreciated!