So my 2 Molly's (pair) have been great in my 100 gallon reef (in progress) but about a week ago I noticed the female molly would stick right at the top of the tank while the Male and the 2 other clownfish behave normally. Levels nitrate 0 Nitrite 0 ammonia 0 salinity 1.026 (on my hydrometer). Thx again