Water vacuum

[Coralgurl]

What does everyone use for a water vacuum? I have one that attaches to the tap and it clogs when cleaning the sump within a minute. I need to clean out my overflows as well, full of crap. We are going away and I'd like to get a good water change done before we go. I didn't have this issue on the smaller tank as it was sump less, the crap got picked up in the canister and skimmer.