Change every 3-4 weeks. -Custom designed and manufactured for Beckett Pond G FR DP Pump, Part No 7710. - Provides efficient water flow with less clogging for long lasting filtration. - Enhances biological filtration.
These have a very tight fit initially. Not easy to slide on and off. Maybe after time they will loosen up a bit. I have to make a one handed reach into my pond to change these and it makes it a little challenging. But, for the price it could be worth the challenge!
This is not a replacement for the OEM filter. Inside cylinder diameter is too small. Filter material is not the same and requires frequent cleaning. This is not worth the money, no matter how inexpensive.