So I can’t seem to get my nitrate levels under 25. They stay right at 25 on my salifert test kit. I run a skimmer and filter media to bind nitrates. Any suggestions? I also do weekly 20% water changes but stays the same. It spiked to 40 when I had a snail die but right back to 25 next week. My frogspawn is growing and seems very happy. New reefer and not really sure what to do. All other parameters are right where they need to be.