Somebody please what the heck is this?

[Pelagikos]

Been fighting low phosphates and high nitrates finally got my nitrates from around 100 parts per million to around 25. Keeping my phosphates up by dosing neophos everyday. These things used to disappear when the nitrates were out of control during the night but then would return during the day. Now they are constantly present. Any help would be greatly appreciated.

 

[EeyoreIsMySpiritAnimal]

Looks like cyanobacteria. Is it only in that one area? Try manually removing the mats and then increasing flow across that part of the tank.

 

[A_Blind_Reefer]

I can’t see, so can’t tell you by pictures but what you are describing sound like Dino’s / dinoflagellates search for that and see if that’s what’s going on.

 

[fishski13]

Looks like cyano. Try to siphon it out, should be a sheet of algae thats should come up under a siphon without touching sand. After you remove as much as possible, try to increase flow on the sand bed. If this continues, try chemiclean.

 

[sfin52]

I think its both what your nutrient numbers

 

[bstodds15]

Cyano - siphon it out, increase flow across the sand bed and if you can lower the white light on your tank that will help.

 

[CoralB]

Cyano . More flow , siphon sand , add microbactor7 and keep your parameters in check

 

[Tuan’s Reef]

I can see your acros is bleaching out. what are your params?

 

[A_Blind_Reefer]

Ah, cyano makes sense….the disappearing at night and reappearing during the day comment is totally Dino’s, but I didn’t catch that was before and now it stays all the time.

 

[GK3]

Been fighting low phosphates and high nitrates finally got my nitrates from around 100 parts per million to around 25. Keeping my phosphates up by dosing neophos everyday. These things used to disappear when the nitrates were out of control during the night but then would return during the day. Now they are constantly present. Any help would be greatly appreciated.

They look like dynos. I feel like it’s fairly common when fighting nitrates/phosphates because the bottoming out allows them to show up.

 

[ZombieEngineer]

Your first pic has the color of Cyano but your description is a much better match for dinos. Run carbon as a precaution. You can do the paper towel test to determine if it's dinos, but will need a microscope to determine the strain. Until you know better I would treat it as Ostreopsis to play it safe.

 

[PeterEde]

I had similar issues. NO3 just kept rising until I got a PO4 test kit and found undetected No4.
Since dosing Phosphorous I have now dropped NO3 to 20ish from 40+
I went through cyano as well