i have two acro that rtn this week and i am afraid it might spread. do you have any advice, what should i do? i have not add anything to the tank lately so i dont understand why there is rtn. the big acros died in less then a day.
If your temperature is above 78 degrees, reduce it to 78 degrees or lower. Usually RTN will not happen if water temps are below that unless there is a water quality issue. Other tips include increasing flow, oxygenation, replacing old bulbs, water changes, testing water.
