Lab Test RO/DI Water

[71xlch]

I see them as tan. Possibly not enough nutrients

 

[gig 'em]

I'm not sure nutrient are the issue here, especially since PO4 and NO3 tested normal in a very large water volume that has been stable for several years. Also nutrients wouldn't explain the filaments coming out of the corals all the time. In my experience that's a sign of a mad and distressed acro.