Question about flow.

[Treenk]

When I got my tank it was used and it came with 2 power heads. I'm struggling to get flow without the entire tank having too much. I'm pretty sure it's on the lowest setting. Any suggestions? You can see the blower in the back.

 

[huckjai]

Pump is possibly too strong for that tank? Only thing I can think of trying is positioning the power heads at different angles?

 

[BeejReef]

I think yours are the same as mine. Try using the w2 mode. This ramps each powerhead up and down in strength, not on and off. If you stagger the "fast-slow" nob so that each ph is a little different than the other, you should end up with some nice random flow. It should also be a good 40-50% less than what you're getting with them both on constantly.

Also, think about coral placement and scape design. Your hammer coral is sitting right in front of a pretty solid looking rockscape. All of the left/right flow in your tank is probably being funneled between the front glass and the rocks causing unusually high flow right in that spot.

 

[Treenk]

Yes it definitely just travels around the glass, but I cant get myself to commit to an arrangement for coral or aqua scape lol I may even move some of the rock to the sump. I only use the one powerhead do I set it to wave? On/off thing? Or maybe just flat point it at a rock? I have a second one but it has it's own dial I dont know how they would link. I've figured out most everything and kind of left the learning about flow on the back burner. But it's obvious my duncan and hammer hate that much flow so I need to figure something out.

 

[BeejReef]

I'm not sure on your model. On mine, there is a way to set one to master and the other to slave. I haven't done so myself. I just figure that actual random is probably better than programmed random.

An easy way to get an idea of the flow your powerheads are creating is to mount them at the very top of the tank to the point where they start sucking in air and creating a lot of bubbles (and noise). Then you can see when they're turning on and off, or ramping up or down, as well as the basic patterns of flow you're getting in your tank.

I'd probably use both powerheads, but maybe not until you've figured out how to avoid crushing your hammer with flow. Best of luck.

 

[Wee Mad Arthur]

As mentioned slowest will be w2 (pulse) and turn the dial to slow to allow more time between each pulse. Pointing the wave maker at the surface will probably help. Sometimes it’s just about getting the right angle and height. If it’s currently clean it will lose some flow over the next week as crud builds up on it anyway.

 

[Uncle99]

I can’t see your wavemaker, some push a big punch. Why do you think you have too much flow, it’s usually the opposite. Good flow for mixed tanks is 20-30 times turnover, SPS 50-100 times turnover.
In any event, that’s the lowest setting, but you have the mode on H (constant) better to put on C (One on/other off) then reverses, turn the dial up a bit so that the pulses are not as quick, that should settle the flow down a bit.

 

[lapin]

I have 2 small Jebaos in a 20 gallon tank. They are on a timers. While one is on the other is off. Changes every hour. I call it random flow.

 

[Eleni18]

which model is it? OW25 or OW40? how many gallons? I have both the 25 and 40 in a 75 gallon tank.Keep in mind that at "else" the flow is random from fullton min power, the dial and speed mode can't be set to minimum. You can only do this if you set the mode to w1 or w2