Dinoflagellates in reef.

>inb4 diatoms/cyano

I've dealt with both of these in the past with ease.

>>2165232
they can be a bitch.
Personally I just wait them out or get animals that eat them. Usually if you've got dyno there's a lack of pods. Some fresh rock or sand with a good batch of pods might help.

Other than that try to get 0 nitrates/phosphates. Carbon dosing and solid skimming discipline might help. They often go away on their own for no apparent reason.

>>2165232
a couple other suggestions in case you aren't doing them already-
run a UV sterilizer at an effective kill dose

dose vodka

fluidized bed or canister filter. Yes, they're nitrate factories but they also consume nutrients and compete with other nastier critters. A biofilter and a turf scrubber are an effective combination for starving out dino and cyano.

Passive filter carbon until it clears up.

Water changes, make sure your RO/DI is still working right.

>>2165232
Ive heard conchs and other snails eat them, also what the other anon said about keeping nitrates and phosphates at 0. which starts by exporting nutrients

using a 200 micron filter sock is supposed to help as well.

>>2165283
I have tons of pods crawling around at night. I remember dipping the big rock full of zoas in freshwater for 5 minutes, got dozens of pods falling out.