Copepods Amphipods & Phytoplankton & leave it as long as it doesn't get worse. Dosing something to fix one problem will just create a different problem never failsJust a quick update, I'm dealing with dinoflagellate ( Prorocentrum )
Prorocentrum do not go waterborne when lights out, making UV treatment unlikely to work.
As far as I can see I have a couple of choices
Dose silicate ( water glass ) to induce a diatom bloom to out compete the Dino's.
Or remove the sanded
Any thoughts welcome