Boxtech Multifunctional Electric Aquarium Gravel Cleaner Water Changer 12V
Product Review (submitted on September 4, 2021):
I gotta say, this vacuum water cleaner gets the job done. It is versatile, as I've used it in a 55 gallon, 35 gallon tank and a 1 gallon tank. Did a great job on the tank my Ramshorn snails were temporarily in(as for their size produce a large bio load).
I noticed the other day, that a brush and a sand washer was added, they look useful.