VERY old pic,.. but this shows how I have mine setup:

Whiskey

 

I'm not saying it's too much, but thats a lot of flow for a 90 gallon. You've probably got them in the best place, but have you tried angling them up towards the water surface? Another option that I use (i've a single 6100 in a 58 gallon with no controller) is to have it blow across the front glass long wise. This depletes much of the flow, as the Tunze is going in an upgrade in the next couple months and I just bought it early. I'm not sure how well that would work wtih your sand bed, though. I currently don't have any sand in my tank.

 

You got to big of pumps for your tank. If you can only run them on the lowest setting. you need some smaller units.:doh:

Just pm me the price for the set so you can by the correct size:beer:

 

I got these at a great price and I am jumping up to a 300 gal next year. These work great...just want to see if placement could be better.

 

can you aim it up facing towards the surface and towards a far corner so that it deflects off the water surface and then two glass surfaces? With all the flow I bet it still makes it to the bottom, Another thing you might be able to do that I had to do is,

arrange the rock in such a way that there are barriers kinda like this

|rock| softy coral |rock|

so that flow goes above and in front of them but not between them, I was able to create nice tranquil areas like this and still have alot of flow going around.

 

I have two seios and was having the same problem with them. I placed a cpl of peices of lr right in frount of them to break up the flow that worked for me

 

Not to hijack the thread but what settings is everyone using on their multicontroller 7095?

 

I have mine at seq1 alternating left to right every 6 hours