APS filter 50000

OAnybody interested i bought the aps filter 50000 back in feb and last week backwash stopped working i was sent an email about.resetting the.backwash by taking it to bits inside ,must dome.something wrong it came out as a dribble after a lengthy battle of emails aps sent me replacement filter to be honest i was hoping to get a refund because i wanted to project a bog filter so if.anyone interested £500 for the pair as these sell for £550 i said backwash not working on one but other only opened today setup at side of this because i need the bacteria for pond cleanup done today im in preston area plus uv still working on both sets pr1 lancashire See less