Please help ID Dino’s type

[christwendt]

Hello. I’m having such a hard time and losing corrals from Dino’s. I initially did a 3 day black out , and added a large UV sterilizer (40w) pentair to my 100 gallon tank. It seemed to help I ran it for 2.5 weeks. The Dino’s have came back I’m wondering if I’m not IDing them right and I need to use a different approach ?

My nutrients bottomed out like 7 months ago which started the problem. But I fixed that months ago and they won’t go away. My nutrients are now nitrate 15 and phosphate 0.1.

What type does this look like?

 

[Lavey29]

https://www.reef2reef.com/attachments/dinoflagellateid12_12_2019-pdf.1324729/

 

[christwendt]

https://www.reef2reef.com/attachments/dinoflagellateid12_12_2019-pdf.1324729/

Appreciate it. I have read that thing from top to bottom like 5 times. It appears large cell don’t make strands and are tackled without UV but all others are with UV. I even recycled UV to circulate only in display closed loop. They came back. It looks like I have a toxic kind as corrals are ticked. It has strands very long.

I’m also battling green hair algae that the Dino’s are growing on which I believe is making my urchins not eat the algae. I suppose I will redo what I did last time but this time keep the UV on longer ?

Am I correct to say large cell is only kind not impacted by dark, lives on sand, no strands , and UV doesn’t work?
So it’s safe to say UV should work on this as my Dino’s does not have any of the large cell characteristics.

 

[Lavey29]

My eyes aren't that good and I don't use UV. Dino battles are typically multiple months battles. If you are keeping correct parameters now that is part of the battle. I would use the uv at night if they go into the water column. I would dose PNS probio which is a natural heterotrophic bacteria that eliminates organic waste feeding the algae on the sand. Stop the white light for several weeks. Blue and uv only. Daily manual removal of GHA and raise magnesium to 1500 it will help with GHA.

 

[mcarroll]

If you haven't looked at the main dino thread, I recommend reading the whole first post so you have the entire routine down.

Dinoflagellates – Are You Tired Of Battling Altogether?​

I'm not sure from your posts, but it sounds like you could be discontinuing UV too soon. There may be some other factors you uncover as well.