The answer can vary depending on your filter. A clean filter significantly contributes to keeping your pool in good condition. We recommend checking when the pressure rises to about 10 psi., and then you know it is time to clean your filter.nnDue to the length of the summer pool season, daily filter cycles can be overworked and lead to a reduction in the filtration. When your filter is not cleaned correctly or efficiently, the flow rate of the circulation system drops. Your pool can also become green, cloudy, and murky due to your filter not being cleaned.nnAt Juliano’s, we recommend you always clean your filter at the beginning of your pool season and before the closing.