29 gallon tank stocking list is 2 clownfish, around 7 hermit crabs, and 3 turbo snails. The tank is roughly 7 months old and coralline algae is starting to appear which is a positive sign. Is the sand bed due to the ugly stage? Is there anything that can be done to fix it? I have been conducting water changes every week for the last 2 weeks. I siphoned the sand bed today to see if that makes any difference.