I’ve had my tank set up for around two weeks. I’m cycling it right now. I’ve added Tetra SafeStart (yesterday), and I’ve been adding food to try to speed up the process. When I do water changes, the water still has a lot of food/nasties in it. I don’t know if the gravel is just good at hiding it (even though I’m cleaning it), or I’m not cleaning correctly. How can I get this old food out? Thanks!