Highlighted in red is a definate problem.. According to the test kit (wardley's liquid test kit) nitrate over 60 parts per milion is a danger zone and will cause problems for your fish. Many of the books and Web resources claim that over 40 ppm (parts per milion) of nitrate is too high; I agree with the later that anything over 40 ppm needs to be adressed. What are the nitrates of the water you use to refil/do water changes with?
Originally Posted by ADAMeh
I have a well established 20 gallon tank no changes to the tank in the last month all water levles are fine ph 8 amonia 0.1 Nitrite 0 Nitrate 75. I have one platy that looks fine is eating etc but is breathing very heavy very quiet and hanging in corners this has been going on for 2 weeks now i also have noticed in the last 2 days my other platy is developing the same symptoms. Today my pleco seems to be breathing heavy other fish in the tank are 5 black phantom tetra and 6 cardinal tetra. Please help me as im going out of mind trying to figure out whats wrong. Also i cant see no marks cuts whitespots or nothing on any of the fish and there gills look fine. Have also treated with anti internal bacteria but this has not helped please advise me as i dont want to loose any fish thank you.
I highlighted what I percieve as a potential problem in blue (as yellow is hard to read). Your ph seems high to me, but I am currently at work and don't have the reference handy... Dano may be able to give a better answer on your ph levels.
What is your water temperature?
you can do partial water changes every other day to help get the nitrate down (10 to 15% or two to three gallons each change).