Originally Posted by caseynewton
Live rock and bio balls. I use a blue filter media to remove large particle, but no carbon or other.
Bioballs can become a problem but it you do remove them i suggest removing a 25% a week and testing just to make sure your live rock is keeping up with bio filtration.
Bioballs trap organics, they stay there and rot, producing nitrates and phosphates. Also any other media should be changed or rinsed regularly to avoid nitrate issues.
Hope that might help get those nitrates down to zero
29g Mixed Reef, 150w 14k Phoenix MH w/ Moonlights, Reef Octopus BH1000 HOB Skimmer, Ecotech Vortech MP10es, ReefKeeper Lite (Plus), PH Probe, Temp Probe, ATO, Carbon/GFO Reactor.