I have Seachem Pond Matrix in both of my Fx5's. How often does everyone rinse there Pond Matrix? an how? just rinse under sink?
Dont use water strait from the sink the chlorine will kill your good bacteria. Just take some water out of your tank in a bucket and give your matrix a rinse.
Do not rinse under tap water. Get a bucket, fill it up with aquarium water and rinse the media inside