Hi can someone help with this skimmer pump dilemma. After my reef octo skimmer decided give in. I thought I would buy a new pump. However finding the same pump is impossible. My reef octo skimmer is a 152 s and the pump is an AQ1800 s. Should be simple....WRONG. My pump is the same as the one shown on the website. However the replacement pumps are totally different. Can anyone help or have an idea of how to find the same pump. Thanks for any help.