I bought a used 18' Intex metal framed pool at the end of last summer. The previous owner discarded the inefficient intex pump/filter and upgraded to an older Hayward DE EC40 filter. I am perplexed on how to attach the Intex hoses (each hose end has the gray collared threaded screw on ends) to the Hayward filter that has ends meant to attach pool hoses with a hose clamp. Any suggestions? Thanks! (ps- my first post here so hope I covered everything).