I've had trouble keeping my plants alive in my 30 gl tank that is about 4 months old. I've got the correct kind of bulb in the tank and have that on for about 10 to 11 hours a day. My question is how to I use these tabs. I do not understand the directions. They state to insert one tab in the gravel for every 4 to 6 inch radius. Can someone please explain this to me. I dare say I'm a college student entering my senior year and maybe I'm just dumbing out on this one but I don't know what they mean. Thanks for your help!
-Kyle
-Kyle