Hi I have 3 goldfish in a 10 gallon tank,( I know not that big of a tank for goldfish ) but I recently got a api master test kit and got a straight up red or about “100ppm” for the test, I tested everything else and everything else came out great the ammonia nitrites and stuff. So I’ve started gravel vacuuming and taking out 20% daily but my tests are still coming out red. Forgot to mention there were 4 goldfish but one of mine died 2 days ago, none of the goldfish are getting his symptoms but they are less active right now, I have noticed they have been acting very drowsy and not moving a lot. So, will my goldfish be okay? and if I keep on gravel vacuuming and taking out 20% will my nitrates eventually go down. One last thing, lol sorry, I am fasting them for 2 days and then feeding once after the fast is it ok and will they be ok? thank you.