I am in the process of setting up my new 55 gallon tank. Have a few questions. What is better to use as a base sand or gravel when using live plants? I was told by the people of percolate that using sand is harder during the water changing process because you will suck up the sand as opposed to rocks which won't be taken out during the cleaning process. Any advice or pros/cons to using either gravel or sand with live plants.