I agree that your feeding technique is likely the cause of your NO3
issue (although at 10ppm, it is not too bad). The "juice" produced when the food is thawed is very high in NO3
. Get yourself a fine mesh brine shrimp net from the LFS
and thaw your food in that, rinse it well with RO
water so it is clean. One feeding every other day is plenty for most community tanks. It is also a good idea to soak the thawed food in dietary suppliments like Selcon or Vita-chem for a few minutes prior to adding it to the tank.
Making sure your source water is free of NO3
will also help. If you are not using RO
water for top-offs and water changes it is a good thing to look into. I also recommend getting another NO3
test kit and doing a comparison.