i have owned this oscar since she was a baby i've had her for about 8 years now and she has had a history of constipation. i've treated her with salt and raising the temp, i've tried to feed her peas but she wont eat them. shes on NLS pellets now and she wont eat those either and this is the worst i've see her. the nitrates nitrite and ammonia are at zero levels. i've added salt over time and i am not sure how much salt is in the tank now. does any one know what the salinity level should be if it is 1tbs per 5gal? or should i add more salt to the tank? shes been constipated for about a week and shes pretty big now she's never been this constipated before. please help!!