I recently lost my diamond goby after almost four years. I would like to get another, but my sand bed has diminished to 1-1.5" over the years. My tank is a ten gallon tank with two clown fish, a cleaner shrimp, some hermit crabs, a couple of nassarius snails, and two trochus snails. The tank has been set up for 19 years (I got the clownfish about 18.5 years ago), and I changed the sand about 10 years ago. Is it safe to add more live sand to give the new goby more sand to sift? Thank you for the help.