So today, I got up like normal and went down to feed the fish... Except, the fish weren't there... I was very perplexed and was looking on all sides of the tank and saw nothing... I'm thinking they are still alive and possibly the two gudgeons are breeding? But I dont know how long that takes... I'm giving them an hour to come out before I go in and pick up a few rocks to see if they are ok. What are your thoughts?