Stringy algae help

[Kymot]

Hi folks, my reefer 250 about 8 months old started to have cyano about a week ago and did chemiclean treatment and did a 20% water change and it got rid of it and everything was okay. But now i’m getting this stringy brown looking algae all over that are harassing the corals. I only have a couple of easy sps (digis, birdsnest, slimer), toadstool and a couple of gonis. I thought it would be dino but the parameters seems right
Po4: 0.11 (Hanna)
Nitrate: 10 (Salifert)
Alk: 9.2 (Hanna)
The sps are also showing sign that they arent doing well, not really sure why? Would love some thought from more experience reefer. Attached a couple of pictures

 

[PSU4ME]

Looks like dinoflagellates

 

[Kymot]

@PSU4ME that what i thought as well, but i thought dino typically happened when parameters at 0 for nitrate and phosphate while it's not. Maybe there're many kind of dinos?

 

[thrillreefer]

There are MANY kinds of dinoflagellates. Some common ones that get out of control in reef tanks, do you have access to a microscope? Def looks like Dinos to me but knowing which type you have can help.

I had them show up twice after fluconazole treatment so maybe the chemiclean cleared out beneficial microbes a bit too much and let Dinos get the upper hand?

UV can help, bacterial dosing, siphoning the Dinos, and getting more microbial diversity to take over the same ecological niche.

 

[ifarmer]

i usually start all over again when this happened to my previous setups.

 

[PSU4ME]

I don’t think you need to start over but you gotta knock it out. Try a 3 day black out and get some new bacteria is there (microbacter 7 etc). Suck out as much of it as you can. Maybe a care package from indo pacific sea farm. It’s beatable. A scope to confirm the strain is also helpful.

 

[Kens Bees]

Found this kicking around the interwebs.

 

[DrPants]

That is a fantastic guide Kens Bees.

Kymot, if you need help ID'ing your algae I'd be happy to help.