Instruct: Classify Amazon reviews into positive or negative sentiment
Query: updated review

this thing is noisy (from the impeller). Its installed correctly and I went through the troubleshootingsection even though its pretty basic on how to install everything. I have older bio wheel filters and they seemto have cut corners in the quality lately. I emailed the company to see if they will send me a replacementimpeller and they do not even bother to reply. Time to go to a company that makes better products and cares about the consumer..UPDATE-I rec'd a new impeller from the seller few months ago and it has been very quiet. Keeping the tank crystal clear and all of theparameters are within normal limits.