I would get a cheap gravel vac from walmart (their like 5 bucks) their very weak and you could take your time as it not powerful at all, and put the tube into a bucket, so in case you do get one, hell be in the bucket =D I got the smallest one they had for my 20 gallon, and when I got a new one with a larger pipe thing, I was surprised to realize how weak my little one was, but I use that one because I have more time to get more waste without all the water coming out fast like on my newer big one. With my bigger one, theirs still waste left when my buckets full of water, forcing to do another bucket worth!