Hello Reefers- We have a 125g mixed reef 1.5 years old. For the last 4-5 months, we've had this strange mustard yellow, dark red, and black film that grows on the live rock and kills corals. All colors are easily blown off the rock by syringe or light brush--- which we've done 1-2x per week since it started, but it grows back very quickly. Can you help us identify and correct the issue?
We check parameters 2-4x per month - here are our average results
78deg F
1.026 Salinity - Instant Ocean
8.1-8.3 pH - Salifert
5-7 - NO3 - NYOS
.06-.08 - PO4 - Hanna
8.5dKH - Hanna
480 Ca - Hanna
1440 Mag - NYOS
(2) PP8 Wavemakers
(1) CP150 Gyre Pump
(2) 450g Pumps through drip trays/filter media
(1) DCS3000 through refugium with caleurpa
We use ROX .8 carbon & GFO in mesh bags under the drip trays
(4) Kessil 360's - 12 hour ramping up/down light cycle
We dose BRS 2- Part & Vinegar
We check parameters 2-4x per month - here are our average results
78deg F
1.026 Salinity - Instant Ocean
8.1-8.3 pH - Salifert
5-7 - NO3 - NYOS
.06-.08 - PO4 - Hanna
8.5dKH - Hanna
480 Ca - Hanna
1440 Mag - NYOS
(2) PP8 Wavemakers
(1) CP150 Gyre Pump
(2) 450g Pumps through drip trays/filter media
(1) DCS3000 through refugium with caleurpa
We use ROX .8 carbon & GFO in mesh bags under the drip trays
(4) Kessil 360's - 12 hour ramping up/down light cycle
We dose BRS 2- Part & Vinegar