I have two opposing each other on the sides of the tank, right now.
In the past, I have had one on the upper left side and one in the back right corner pointed up.
Thanks. I'm I'm running one on the left pointed up, two on the right, one up one aimed at the front middle glass. I feel like I'm getting good surface movement, but not enough movement to keep stuff from settling on the sand. Trying to figure out if I need to change something up or not.
Its hard for me to get pics of mine, the tank profile doesn't fit in the pic. But I've just got mine on opposite ends of the tank, using the directionals that come with them.