Ok, I'm changing my little 75g from gravel to sand. I bought pool filter sand. I've already removed all the gravel. Now what is the best method for putting in the sand. Do I drain the tank, add sand and refill. Can I add the sand to a filled tank? If so, how?? What is the best way to add sand?? Just need some pointers from some of you guys that have experience with this. I just want to do this right. Thanks!
never had to empty any water from my tank