Cyano issue-need advice?

What fish do you have? Some eat CUC (I bought $50 worth of wrasse-snacks before I learned that ;) )
4,000 gph will deff move the water more than just the overflow does, but in a 120 you might still have a dead spot or two. You can always add another if needed. It's really hard to predict cause every tank is diff how the water bounces off the rocks etc. I have 40xDT volume for gph from my powerheads, you don't need as much for fowlr tho. It's pretty hard to overdo it so no need to worry there, but your fish might appreciate a gradual change from such a still-water enviro. Maybe a few days between additions to be super cautious?

I wouldn't go spending on lights yet, but you can try turning it off and skimming wet for three days. Sometimes you get lucky and that does the trick. It's a free thing to try anyway :)
Oh, so you have a skimmer or what are you doing to remove waste (filter, water change etc)?

PS those koralias come with different grills. If it feels weak you might have the restricting attachment on it
 
What fish do you have? Some eat CUC (I bought $50 worth of wrasse-snacks before I learned that ;) )
4,000 gph will deff move the water more than just the overflow does, but in a 120 you might still have a dead spot or two. You can always add another if needed. It's really hard to predict cause every tank is diff how the water bounces off the rocks etc. I have 40xDT volume for gph from my powerheads, you don't need as much for fowlr tho. It's pretty hard to overdo it so no need to worry there, but your fish might appreciate a gradual change from such a still-water enviro. Maybe a few days between additions to be super cautious?

I wouldn't go spending on lights yet, but you can try turning it off and skimming wet for three days. Sometimes you get lucky and that does the trick. It's a free thing to try anyway :)
Oh, so you have a skimmer or what are you doing to remove waste (filter, water change etc)?

PS those koralias come with different grills. If it feels weak you might have the restricting attachment on it

I have dog face puffer, porcupine puffer, clown, two small blue tangs. I have Vertex Omega 150 skimmer. What is the restricting attachment on those pumps?
 
Yeah, your puffers are going to limit your CUC a little bit, though I think it's good for their teeth to eat snails. Not that the CUC would eat much cyano anyway, but some can help stir up the sand so it looks better.
Idk, maybe some kinda goby to stir sand up, or do puffers eat serpent starfish? I'm not familiar with puffers. The tangs should keep algae down anyway. If they are hippos they'll need a bigger tank soon.

The instructions should explain the attachments. I think they are like little circles that snap into the front. They change the direction of the water and keep out fish. The ones with smaller holes let less water through.
 
If you're going to spend 80$ on a pump I would rather have a wavemaker. Even though you aren't keeping a reef the wave action really helps to lift out detritus much better than a laminar flow pump ever could. A good pump in that price range would be a Jabeo RW-8 I would get two of them the flow can be adjusted to fit your need.

http://www.amazon.com/Jebao-RW-8-Wavemaker-Controller/dp/B00XRDWKNC/ref=sr_1_1?ie=UTF8&qid=1449384282&sr=8-1&keywords=rw-8

Would the wave action be a better pump than the Koralia 3rd generation. The reviews are great. The R-8 seems like it would be the right size for what I need in a FOWLR.
 
I've got a couple sunsuns that are still in service after a year.
I think it's pretty ignorant when people say that if you can't afford an $80 powerhead you don't belong in the hobby. The bells and whistles are nice for some but hardly a necessity. They both push water, duh.

This thread has gone off the deep end, I'm reporting it.

Didn't you say in a thread a while back that you have to replace them from time to time because the break. Maybe I'm thinking of someone else.
 
Would the wave action be a better pump than the Koralia 3rd generation. The reviews are great. The R-8 seems like it would be the right size for what I need in a FOWLR.

Either one will be good for your tank. Me personally I would want a pulsing wave as it lifts detritus out better than laminar flow does. Its up to you though they are both the same price. Both are good quality.
 
Just want to say I wasn't the first to insult in this thread. I merely gave my opinion on a pump and was insulted because of it.
 
Didn't you say in a thread a while back that you have to replace them from time to time because the break. Maybe I'm thinking of someone else.
I broke a couple of the clips that hold them to the suction cup b/c I was moving them a lot to get a particular flow pattern and jamming really hard on the levers. The clips are $3 to replace. The sunsuns hold up really well, when I was setting up my tank I talked to a couple old timers who've been using them for almost ten years.

@Dunder the diff between a powerhead and a wave maker isn't a brightline. Manufacturers and reefers often use both words to describe little fans or actual pumps that go in the tank. I would guess that technically a wave maker should have some variation to it, like a pulsing function, but that isn't how people use it. They are both words for "thing that moves water in the tank"

ETA: can we not play "he started it"?
 
Chemiclean is really effective at killing off cyanobacteria. I stopped using it because it seems like the cyano is converting nitrates into nitrogen gas (the bubbles that form underneath it). I was resigned to always have some in my display tank, but it stopped spreading last week and I sucked out the last few clumps a few days ago. I still have it in my refugium though.

Like another poster said, it seems to have its cycles. Once it depletes its nutrients, it dies down.
 
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