I cleaned 400 records before I changed the filter. My records have been well cared for over the years, so I am not cleaning filthy records. If I buy used records I always look for mint or mint- condition. Like I stated, this filter has worked great for me.
1 Micron in-Water Filter for Ultrasonic Record Cleaning Tanks
iSonic has a 1 Micron in-Water Filter that will work with almost any Ultrasonic Record Cleaning tank. It is a very simple design filter that hangs in the side of the tank after cleaning your records to restore your tank solution back to clean again. It has a 1 micron filter that fits inside the pump and only takes about 10 minutes to cycle the water in the tank. It is available at Amazon and is reasonably priced.
https://www.amazon.com/gp/product/B0BBZVKD7Y/ref=ox_sc_saved_image_5?smid=ATVPDKIKX0DER&th=1
I have owned this filter system for about 5 months and it has worked flawlessly. The only other thing you need for the filter is a 12 volt power supply which you can also get at Amazon for about $10.
CleanerVinyl sells a similar filter setup for their ultrasonic tanks at a cost of $400. That is outrageous !!! I highly recommended the iSonic setup, a very simple design that works great.