my female creamsicle molly and my male dalmation molly are very active, I don't think ive really ever seen them stop moving for the 5 or so days ive had them. ever since I got home from work theyve been huddled together behind the heater. I felt this was very weird behavior so I did a 30% water change (I had done one yesterday as well but my tank is not fully cycled yet). they came out and swam for a little and now theyre right back to being huddled together behind the heater. I don't have many plants in my tank yet so I guess it would be the only real “hiding spot”.. its just very strange because they never stop moving. any idea?