i checked last week a 20 n0 n0 ph 7.1
10 gallon
10 gallon top fin filter
every week 10 %
pleco 2 inches,female guppy 1 inch ,male guppy 1 inch,female betta 1 inch,2 neon tetras both 1 inch
we have well water no additives
once just now
no new fish
tetra color tropical flakes & aquarian bottom feeder shrimp pellets
no
swims on side in the middle


hes swimming on his side im feeding him some medicated fish food

well thanks for being soooo helpful and not answering ive found out now i have to euthanize my tank and restock it so thanks!

What do you mean euthenize the tank? I hope you didnt kill all your fish.
Im sorry no one got to your question sooner but we are all busy and it takes time for questions to be answered.

What have you been told is wrong?

Is it just the one fish thats on its side? Maybe he has a swim bladder problem. Does he do it all the time or only when the light is off

For a 10 gallon tank you are overcrowded so i would have said try doing lots more water changes.