Green Hair Algae and Dinos Help

Kunala6

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Hi
I have a 150 Lagoon, and I noticed green hair algae growing rapidly. So I got a few turbo snails. I got them twice. They all died except for one after a week or two. There was enough green hair algae in the tank, honestly they didn't even put a dent in it. I notice though they became sluggish after a week. I also had thinned it out as long hair algae may not be appealing to the snails. I have not noticed anything with my fish or corals. At the same time I notice brownish sand, when the lights are out it goes away. After some investigation I found out it is mostly like dinoflagellates. The snail ate this, killing them. I have two small urchins and Algae blenny who seem to be doing fine and eating the algae but they can only do so much. My tang and rabbitfish do not seem to care for it. Currently I am using Waste-Away to combat this. I use 75ml every other day. The full does I believe it 150 ml but it does recommend half dose first day. The hair algae isn't thick and brushes away easily for the most part. I haven't done a water change yet, as a recommendation from Dr. Tim's site to allow for at least 48 hrs after using waste-away. My skimmer is off. I was planning on running carbon once I got this all under control. Should I use carbon now, where should I put it. my sump setup is filter socks, followed by skimmer then refugium. The sump is the Innovative Marine RFS39 Sump. I scrub the hair algae every few days and change the filter floss at the same time to get rid of as much as I can. I started the treatment four days ago. I am not sure if I should start using the 150ml of waste-away. I also added an air pump since the skimmer is off and waste-away may deplete oxygen levels. I know it is recommend to do a black out, which I do plan on doing if this doesn't work, but I want see what works first and use that on a regular basis to prevent this from happening. I feed once a day, maybe light to moderate, and since my rabbit was eating corals I put a sheet of Omega one red seaweed sheet which has helped a lot and prevent it from eating any corals. This is what probably started the giving me the hair algae. As far as my water test
Ammonia= 0
Nitrite= 0
Nitrate=0
Phosphate=0
I have had it tested multiple time over the last month or so I don't think it was a mistake, however I have mentioned my issue to my LFS and they said it could be false results because the algae is taking care of the nitrate and phosphate. Sorry to make this post long I was trying to get all the questions that might be asked answered. The tank has been up and running for a year now. Any suggestions?

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EnterName

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You are most likely right that there are in fact far more nutrients than your tests might suggest. Consuming nitrate requires algae and corals to reduce it back to ammonia first, so they prefer consuming ammonia directly before it is oxidized to nitrite and nitrate.
 

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