This usually works only for external filters: just some filter sponge (like this: http://www.google.com/search?q=filter%20sponge ), get a block/cube of it, cut a hole into the middle and place over the filter intake.jordan wrote:sponge slipper ? whats thatzenins wrote:Good point, I usually have a sponge slipped over the filter intake as a pre-filter to make sure sand does not get sucked into the filter/impeller ...starsplitter7 wrote:But you have to be careful adding water to the tank, so the sand doesn't get sucked into the filter, and cause the impeller to be damaged.
For internal filter, it would be better to line the inlet slots with filter wool on the inside and remove it after the sand has settled.