Phosphates-0 Nitrates 4ppm?

Update for anyone who is following. I have taking out the chemipure blue and cut water changes in half to try and dirty the water. The phosphates are no longer at true zero but still nearly u detectable. I have some hair alage growing that I am hoping will help compete with the alage. Also I took the dive and attempted chemiclean on the tank I am at 48 hours with no results. I believe this confirms that these are not cyano which was originally thought but dinoflagellates. Still no progress but staying positive.
 
Maybe get a cheap microscope and take a look at it to confirm dinos or something else.

Ihad something very similar that was part of my new tank uglies. It was also stringy, gooey, but didn't have bubbles in it. I believe it ended up being a type of diatoms. My DI resin was really oldand "orange" color...i didn't change it since my TDS leaving my RODI system was raining zero. Once i changed the resin and filters...the stringy, mucus-like algae went away as i worked in the new water with my ATO and water changes! My LFS said it was diatoms...and that all diatoms don't look "dusty."
 
Maybe get a cheap microscope and take a look at it to confirm dinos or something else.

Ihad something very similar that was part of my new tank uglies. It was also stringy, gooey, but didn't have bubbles in it. I believe it ended up being a type of diatoms. My DI resin was really oldand "orange" color...i didn't change it since my TDS leaving my RODI system was raining zero. Once i changed the resin and filters...the stringy, mucus-like algae went away as i worked in the new water with my ATO and water changes! My LFS said it was diatoms...and that all diatoms don't look "dusty."
I have a brand new rodi system so not sure for me that would cause it but maybe your right it's time for a microscope
 
I have a brand new rodi system so not sure for me that would cause it but maybe your right it's time for a microscope

Yes, get a small cheap microscope. Then, you will know what you are or aren't dealing with. Dinos are pretty easy to see in a scope.
 
If you run your nutrients too low, that tends to favor dinos and cyano bacteria. Where you want the nutrients to be kinda depends on your coral, lighting, export and grazers. I run my phosphates at between 15 and 30 ppb and my nitrates at 2-5 ppm. I had chronic cyano. Now it is pretty near gone and the hair algae and others are growing. That is ok because my snails gobble that stuff up. They don’t like cyano.
 
When you disturb your sand bed, do you get any cloudiness? If so, you might want to try vacuuming your sand bed when you do water changes. Water tests only show you what is dissolved in the water, not what is readily available in the sand. Whatever you have growing on the sand could be fueled by anything that is in the dust cloud that comes out of your sand, if there is one.

There are a lot of different opinions about optimal nitrates and phosphates. I look at what @WWC recommends and as long as I'm not to far from their targets, I leave things alone and don't chase a specific number. IMO, don't create a problem trying to get rid of something if it isn't hurting anything.
 
Is this hair alage growing everywhere? It looks like its has bubbles but those are from the micro bubbles post chemiclean which looks like it may take some time to get rid of. Also new parameters are salinity 1.025 ph 8 phosphates .02ppm nitrate 4ppm ammonia 0 alk 9dkh just dosed to raise and calcium 380 ppm just dosed to raise as well. Sand bed is currently clean after water change and siphoning.
20180818_160149.jpeg
20180818_160204.jpeg
20180818_160244.jpeg
 
Is this hair alage growing everywhere? It looks like its has bubbles but those are from the micro bubbles post chemiclean which looks like it may take some time to get rid of. Also new parameters are salinity 1.025 ph 8 phosphates .02ppm nitrate 4ppm ammonia 0 alk 9dkh just dosed to raise and calcium 380 ppm just dosed to raise as well. Sand bed is currently clean after water change and siphoning.
20180818_160149.jpeg
20180818_160204.jpeg
20180818_160244.jpeg

When you say the sand is clean, can you stir it without getting any cloudiness?
 
Update . I am officially 4 days dino free! I stopped doing water changes the tank was to clean ! Did a 3 day black out but backed out after one day and just left the lights off for the last 2 days. I also dosed h202 1ml per 10 gallon at night time.
 

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