Still waiting for that coralRX... The flow is moderate, I'm running 250w MH 20k with 4 t5's and they are place mid to low in the tank. Water par.... Ph 8.1, ammonia 0, nitrite 0, nitrate < 5, calcium 450-480, kh 140ppm, copper 0.
My bet it is a nudi, I can't see how else they would jus...