Purchased this item with an open mind, as it wasn't expensive I wondered if it would work well in cleaning my aquarium gravel. I am pleasantly surprised at it's efficiency the small motor creates a powerful vacuum with low noise. It is lightweight and easy to move between aquarium foliage. I hadn't realised that Molly fish poop very frequently and produce a fair bit of waste, with this vacuum I can do a quick hoover up to remove it, brilliant.