Review on 🚀 Enhance Efficiency with Eheim 6664 Prefilter: A Comprehensive Review by Adam Chyliski ᠌

1. When buying, I noticed that the neck, where to insert the intake pipe from the external filter line, is larger in diameter. True, the deeper it goes inside, the narrower it becomes. But still, the pre-filter does not hold, the tube does not fit tightly. It is necessary to compact either with a piece of foam rubber or synthetic winterizer. Those. its attachment to the external filter line is not fully thought out. 2. The suspension still does not completely penetrate the filter. When it is removed, part of it scatters around the aquarium.