Penguin Series A-A in-tank filter systems mount the pump and filter chamber together inside or outside the tank. With no metal to contact the solution, these A-A in-tank filter systems are ideal for precious metals and are proven to operate with no possible solution loss. Choose from eight different styles and configurations. 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 and chamber combination. Or call or chat for free guidance!