HOW DO YOU GET THEM TOGETHER!. I CAN'T GET IT BY THE FIRST BARB AND IT POPS OFF WITH EASE WHEN TESTING THE CONNECTION. TRIED WD-40, VASELINE. NOTHING WORKS. I NOW HAVE BROKE THE PLASTIC FITTING FROM MY FILTER TRYING TO GET IT ON. NOW MY POND IS DOWN AND PARTS HAVE TO BE ORDERED. YES I AM YELLING. I AM SO MAD