quick qustion for anyone who has advice. I bought one of those vacuum to clean the stones while doing water changes. The tank is still dirty because when I refill the tank, all the crap and food off the bottom rises. Is it a smart idea to stir the stones and raise the debris into the water before I vacuum it? That way the vacuum can pick it up? Actually, Is this much debris on the bottom normal? After I do water changes all the fish are eating food and debris from the bottom after stirring it around or replacing the decorations, alot of debris rises, I clean and change water all the time, dont really know whats wrong. Any advice is appreciated. thanks