What's up guys and gals? A few quick questions. I have maintained gravel in my tank for years. Mainly due to the fact that gravel is low maintanance, doesn't show poo on the surface, and is fairly easy to clean. However I am thinking about converting the 130 gallon bichir tank to sand. I have seen a lot of tanks with the 3M substrate and it looks great. Those who have it or sand how do you like it? Is it easy to maintain? What grade is the best? Thanks!