View Full Version : algaecide reefsafe?

07/28/2017, 10:48 AM
I wonder if regular algaecide is reef safe and very efficient in removing hair algae and cyano because some LFS staff say it not a good ideal as it affect a zooxanthellae in coral tissue and coralline algae, what your guy think about this, this is true or just a myth ? The only product i know is API algaefix but never try this before

07/28/2017, 11:14 AM
Well, cyano isn't an algae. It's a bacterial sheet, so algaecide won't do it.
Re the algae that IS algae---if you use an algaecide you would only release algae-fuel (phosphate) back into the water.
The way to eliminate cyano is not chemical: just do a 3 day lights-out (4th day gentle lighting for a reef) once monthly until gone.
The way to eliminate regular algae is by binding it: an occasionally changed load of iron oxide (GFO) in an inexpensive reactor tube will do it: toss the used medium, you toss the phosphate, buh-bye.

07/28/2017, 01:43 PM
read this thread


I'm surprised pictures are still there. that helps a lot to see before and after pictures.

07/28/2017, 02:21 PM
Vibrant is another similar product. I tried Algaefix and it never worked for me. If anything, I had 2 outbreaks of Cyano after using it. I started Vibrant a month or so ago and have yet to see any noticeable results. But at least I haven't had the cyano come back. Several folks have reported good results with Vibrant so it might be worth a shot.

07/28/2017, 02:46 PM
With any plan which may cause die-off all of a sudden, be sure your skimmer is up to the job. At best, if the skimmer can't handle it, it means just another round of the problem. At very worst, a tank crash is possible. Before you do anything that could cause a die-off, have enough ro/di and salt on hand to fill your qt and be prepared to qt everything while the tank recovers. You should have that emergency backup anyway, at all times, but killing off a real bloom of something has some risks, and you do need to be both watchful and prepared.

07/28/2017, 05:14 PM
Some algicide products seem to be reef safe. Which one were you considering? I agree that they might not affect cyanobacteria, though.