It’s incredible how much healthier my system is dosing phyto. My last system, I didn’t and had to clean the glass every other day. Now, it’s almost once a week if that. Live phyto goes straight into the rock work and has minimal clouding of the water. The expensive dead phyto, you need to shut your pumps and skimmer down for hours and is not nearly as beneficial. Best thing I’ve started doing so far. You literally can not add too much of this unless you have a nano. I have a 235 and would feel fine dumping a whole gallon in at once.