maxspect jump gyre - GF308 or GF316

[reef tank 2.0]

I'm gonna pull the trigger on two of these gyres. I am trying to determine if the 308 is better or if the 316 is better for my tank.
I have an 80g cube that measures 32x24x24H. I was looking at the 308 and see it only measures 8" in length. the 316 measures in at 12".
I like the idea of having that extra 4" of length.

i am wanting to get 2 of these gyres, one for each end of my tank.

if i get 2 308s, then the flow would need to be turned up to achieve a good amount of flow.
if i get 2 316s, then the flow could be turned way down.

are there any other considerations to take into account when deciding? they're both very close in price, so that isn't an issue.
i'm almost leaning towards the 316's.

any advise?

 

[tbrown]

Are you going to use a controller or using a Hydros WaveEngine?

Controllability is a consideration for sure. I've got a 70 with a similar footprint - 36" x 21" x 21" with the IceCap Jump 2K and the Maxspect 330 gyres and they're both running at 60% max and still occasionally blow some sand around. You'll want to make sure you aim them good and turn them down more on the bigger ones if you have a sand bed.

Also, I believe there's a lot you can purchase to help direct the water for them, you might consider getting one of those kits.

 

[reef tank 2.0]

I am planning on using the controller that comes with them. No interest in using an app.