I just moved up from a 35 gallon tank to a 78 gallon tank. Tank cycled great. used some of the water from the 35 gallon to help. I have 1 bala shark (about 8 inches) 3 gourami's 3 tetras 2 algae eaters. Recently bought 2 clown louches. The first day the clown louches hid in the tank. Afterwards they made their way out and seemed to enjoy their new home. But now they are in hiding again and I have not seen them in 2 days. I use sand and don't want to tear up the tank looking for them and stress everyone out any suggestions? Is this typical behavior ?