I just switched out my substrate for Flourite Dark. I was dosing 1-2 weekly with FlourinMulti. Should I continue this or should I use a liquid fertilizer like Seachem Flourish and/or Excel? Thought would be helpful. I put root tabs in with the old substrate and had a lot of algae grow. Maybe I put too many. I have a 50 gallon tank. I wouldn't be opposed to root tabs but I don't want another algae outbreak. How many root tabs would be needed in a 50 gallon tank?