7k gallon Intex with SWG, 3 weeks old. Floe through skimmer and output very low, alert came on SWG filter earlier for low flow. Backwashed, turned back on, alert light went off but not even pulling enough suction to dip the wall mount skimmer and output is barely there. All new equip, nothing blocking any pipes, skimmer sock has been changed. I am a newbie and cannot for the life of me figure out wgat this could possibly be.