I bought an Eheim Classic 250 a while ago and it turned out to be very noisy. I’ve had one of these before many years ago and it was fine, very quiet in fact. I contacted the seller and he asked me to send the head back which I did. I took pictures of the packing and the box before posting and emailed it to them. I also sent them a video clip of the filter in use so they could hear how noisy it was. The head was posted 11 days ago and I’ve heard nothing. I have proof of postage. I sent them an email yesterday morning and they haven’t replied. I do hope I’m not going to have trouble getting this resolved. Thinking ahead I’m wondering if I can get a refund if the dealer doesn’t play ball. Not sure if I paid by PayPal (probably) or credit card.