Having nitrate swing from 10 to 160ppm on api and salifert test kits. I test with in the same hour each day and find one day 10ppm next day 160ppm then back to 40 ppm. Reading zero phosphate per the same test. Iam running a skimmer and refugium with chaeto. The later is reversed light schedule from tank. Have done a 20 gallon water change on a 60 gallon system with no effect. Also dosed neo phosphate to readable level .25 and back zero the next day. Still dosing neo phos and Last to days I started to carbon dose. What to look for thanks
1.025 salinity
Dkh7 to 8
Ph 8.4
Cal 460 to 480
Mag 1380
1.025 salinity
Dkh7 to 8
Ph 8.4
Cal 460 to 480
Mag 1380