Powerhead Placement

jacobreynolds6883 · May 5, 2020

Some guidance needed! Since starting up this 90g I have struggled with getting enough flow at the bottom of the tank to keep detritus in water column. The attached pictures show my powerhead placements. The one on the right is an eflux 2100gph turned up to 80%, large powerhead on left is a cheapo from Amazon 3950gph turned up 35%, and the little nano in left bottom corner is a Koralia Nano 525gph. The two larger powerhead son turned onto surge mode and do a great job simulating water flow on a reef. If I turn the speed up on them it picks up sand and also makes my leathers angry (as you can see the toadstool is from me messing with it). Should I keep them in their current placement (opposite sides of tank) and just adjust heights? Would it be beneficial to place both on same side at different heights? I plan to add another eflux 2100 so they can work in sync together but until then suggestions would be great!
1st picture is current placement

second image shows an arrow where I would place if on same side, back corner

Third and fourth photos and close ups of each side

lapin · May 5, 2020

In my old 120g I had 2 powerheads. One in each of the back corners. Pointed at the middle of the front glass. This created enough random flow while not blowing too hard as they canceled each other out. I had one small one on one side, just to blow across behind the rock work to keep stuff from collecting back there.