http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=water-changes_#1 Do you think the harlequin Rasboras will be afraid of water changes as I do this every 5 days about 30%? These are the newest one I have in my tank now. Thanks irwin id 2013-08-02