Any one got any idea what's causing this? It almost looks like something is eating it. It's been doing this over the last few months and nothing has been added or changed to the tank.
Thanks
Tank is 180g
2 mp40
2 EVO 250w LEDs
Calcium reactor
Ev-240 skimmer
Phos reactor running 2 cups of phosguard
Temp 78
Salinity 1.025
Ph 8.3
Mag 1350
Nitrite 0
Nitrate 0
Alk 2.8 mlq
Calcium 400
Phos .35ppm
The corals have been in this same spot for over a year.
Thanks
Tank is 180g
2 mp40
2 EVO 250w LEDs
Calcium reactor
Ev-240 skimmer
Phos reactor running 2 cups of phosguard
Temp 78
Salinity 1.025
Ph 8.3
Mag 1350
Nitrite 0
Nitrate 0
Alk 2.8 mlq
Calcium 400
Phos .35ppm
The corals have been in this same spot for over a year.