cool,i can comment on the brown algae taking over comment.
i recently did a fast change of tanks and my hawkins almost didnt make it. it turned white at the base. at that point i thought it was done. thats my favorite coral so i keep it instead of giving up. the color then turned to brown, i then thought it was done lol. a week later it is turning blue again. i guess what im trying to say is that it will come back as long as your tank is square.