Penguin Series A-B in-tank filter systems mount the pump and filter chamber together entirely inside the tank. With no metal to contact the solution, these A-B in-tank filter systems are ideal for precious metal filtration and are proven to filter with no possible solution loss. Choose from nearly 20 different styles and configurations with flow rates ranging from 100 - 2,150 gph. Click on the model number or to find out the model needed, use the selector menu to choose the motor phase, flow rate, and the type of pump-motor-chamber combination. Or call or chat for free guidance!