Simultaneous PO4 and NO3 removing
When both nutrients (PO4/NO3) are high there is a structural,maintenance or technical problem.
Read the high nutrient topics first: http://dsrreefing.com/nutrients/
Read about bacteria bloom: http://dsrreefing.com/bloom/
Use the Fe+calculator to tackle Phosphate:
http://dsrreefing.com/fepluscalc/
(https://c8.staticflickr.com/1/96/31391460991_2ec2b8f2b8_z.jpg)
Use the CarbonVS Calculator to tackle Nitrate:
http://dsrreefing.com/carbonvs30/
(https://c1.staticflickr.com/1/523/31360391832_9b5ab6c739.jpg)
Worked out dosing scheme for combined Fe and CarbonVS updosing:
(https://c3.staticflickr.com/1/389/31360394442_e095b5a160_z.jpg)