Hi everyone, I've posted here a few times and have yet another question. Currently, my violet goby that I rescued a few months ago is doing a billion times better than he was when I rescued him. He has been living on a gravel substrate, which I know is not ideal, so I'd like to switch it to sand. I live in Maine, and was wondering if it would be safe to collect some sand from a beach area to use as his new substrate. Of course, I would clean and boil the sand before introducing it to his tank, and would measure the SG to be sure that it didn't rise too much. Also, the area where I would be taking the sand from is from a friend's privately owned stretch of beach (therefore not a crime). So my questions are: would this be safe for him? Will the sand mess with my filters? I clean his tank by hand, so would this present a problem for cleaning? And lastly, is there a better alternative? I know that beach sand is relatively fine grained, and some people suggest larger grains. However, my violet goby is still very small (about 5 inches) and I'm wondering if it would be harder for him to filter out larger grains. Thank so much!