Add some Metro in there, mess with their reproductive system.My plan against Dinoflagellates for today.
1.- I will remove all rock and place them in RODI water after brushing them.
2.- Clean and remove any visible dino in the tank (as much as possible)
3.- Filter all my tank water through a sock
4.- Clean wave makers and cables
5.- Dose H2O2 in the middle of the day as @mcarroll said
Probably this is a loose battle but I wont quit.