I run 2 on a 57g tank. Opposite walls. Using a Apex, I randomize it throughout the day.
Here's how its set, the second pump is either as sync or anti-sync, same speed.
The numbers are the % its set at:
Fallback RC_1_100
Set RC_1_100
If Time 00:00 to 03:01 Then Nut_1_10
If Time 03:02 to 06:01 Then LG_2_60
If Time 06:02 to 10:01 Then TS_1_90
If Time 10:02 to 13:01 Then LG_1_80
If Time 13:02 to 16:01 Then RC_1_100
If Time 16:02 to 17:01 Then Nut_1_90
If Time 17:02 to 19:01 Then TS_1_90
If Time 19:02 to 22:01 Then RC_2_75
If Time 22:02 to 23:59 Then LG_2_60
If FeedA 065 Then Nut_1_10
If FeedA 002 Then Slow_1