My advice would be to make sure the light reaches all of the plants once they have grown in.
Linear lighting doesn't work very efficiently in corner tanks IMO.
Shouldn't be as bad in the 350 (as I think it has 4 lights?) but in my 190 with T8's, I had to add a light to the back panel to make sure plants got light back there.
In the two corners, plants don't get much light either once the others have grown in a bit.
So try to plant strategically, use lowish-light plants in the corners and at the (bottom if you cant keep up with pruning). And if it's the T8 version, I would add another light somewhere as it's quite a deep tank.
The other thing is water flow...make sure you have it going in a different directions from more than one pump, relatively dead spots (again, particularly all three corners) can lead to algae.