Hello everybody. I have three little Platys in a 10 litre tank (photo attached.) I have had two of them for two weeks then added a third a week ago. I am concerned as my third platy in the last 12 hours has kept swimming to to the top of the tank for air. I do partial water changes every 3 days due to the tank size (I am considering upgrading to a bigger tank) and have done another partial water change now. Is there a particular water testing kits anyone would advise? Or perhaps would you recommend more plants too? Thanks for any tips.
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