Lee’s Ultra Gravel Vac (Squeeze Start with Valve) – An aquarium gravel cleaning kit featuring a priming bulb and flow control. Simply squeeze the hand pump to initiate siphon action – no mouth priming needed. The attached valve lets you adjust or stop the water flow while you vacuum debris from the substrate. This hassle-free gravel vac makes routine water changes and tank cleanings quicker and easier, especially in medium to large aquariums.