Well my scrubber has bee my sole filtration for years now and I almost never change any water,however I have been having some small issues with the tank this year such as a lack of coraline and some bleaching sps corals. well I went to a good LFS who used new seachem test kits and here are the results:
ph=8.3
alk=10
ca=600
mag=1500
amm=o
trate=o
phosphate=2 not .2
strontium=7
iron=
I have a few questions.
1. I dose Iron all the time,how can it be zero?
2. My strontium is low,should I dose it? does coraline or turf algae use this?
3. Why is my scrubber not removing any phosphate?