Just an observation on the battery powered "sucker", they are ok for sumps, if you don't have enough height for a siphon. The problem with the one I use on my fresh water tanks is that if you are trying to get something from on top of your LR the stupid thing looses suction. If you put toomany extensions on it wont suck anything into it. But as for using it for a sump, I think it would be ok. I like using the wet/dry vac better.