Well FF, I think Doaner wants to start adding corals soon so keeping nitrates lower and in check now will be his best bet. Better to err on the safer side. The LR
and sand build up bacteria colonies that take take care of ammonia and begin the nitrogen cycle. (biological filtration) And the AquaC removes DOC
s and separates "gunk" in the water to collect in the cup. (mechanical filtration). The fluval is designed to do both, build bacteria on media and catch "gunk" from the water. The nitrates come in when the "gunk" isn't removed continually like in the Aqua C. This is the most basic description I can come up with. HTH
But as FF said, (didn't know what the level's were) it's really not that high. Plus you weren't getting any on another test. Not too much to worry about. I think you have adequate LR
for your bio-load. Just be sure if you add LR
in the future that it is fully cured. You can always cure rock in a separate tank or tub if you buy more uncured.