Eheim Quik Vac Pro

[spawn]

Just wondering if anyone has tried these, and/or has any one seen them in Calgary? I'm thinking of using one, not for my gravel, but for cleaning detritus from the rear chambers on my tank. I have a RSM 250 so the rear chambers are basically the sump, and I think it would work well back there. thanks.

http://www.marinedepot.com/Eheim_Quick_Vac_Pro_Battery_Operated_Gravel_Vacuum _Battery_Operated_Siphons_Gravel_Cleaners-Eheim-EH3531090-FIMTGSBO-vi.html