Hi there, what size powerheads (in gph
)? What size tank?
If you take the total gph
divided by the tank gallons, you should end up with 10-20. This is your cycles per hour. Try to aim the powerheads to meet each other in the center front of tank, creating a chaotic flow, not a circular flow. 2 is definately better than 1 larger ph
I put one ph
on the timer so it's only on when the lights are, the other is always on. This gives me a variable flow, and the fish can sleep maybe easier with less flow. Works very well for me, you may like that. You want to have your lights on a timer anyway, I use the timer for one pw and a hob