Hi, recently i have been struggling with high phosphates and undetectable levels of nitrate. I have gone as far as dosing nitrates which show up like an hour after dosing but are gone by the next day. My current phosphates are 0.12, and nitrate 0 both tested by Hannah checkers. How can i raise the Nitrates while keeping phosphates low? BTW i have tons and tons of bio blocks in my sump not sure if that's the issue(probably 20 pounds lol. I have and auto feeder that feeds just enough for my 7 small fish in 112 gallon tank and feed frozen shrimp 1 to 2 times a week and algae sheets a few times a week. weekly 15% water changes with tropic marin pro reef salt and siphon the sand bed. Running a skimmer properly size, filter roller, and just started a reactor with a small amount of gfo made by nyos in a nyos reactor. Im struggling with algae bad due to the phosphates and silicates in water (silicates tested by icp test) any recommendations on the media i should use to remove and what the cause could be. The tanks 2 years old, rocks about 1.5 years old.