, maybe that's why you've heard 2-3 times a week. But as andywg was saying, depends on occupants and filters n stuff. I do mine once a week with the water change. I've moved my snails to their own tank. Cheers XantheIm wondering how often you are suppose to vacumm ur gravel? I heard on another forum like 3x a week which sounds like alot to me.
i havent for 3 or 4 years. the plants take care of it