strange acting blood parrot cichlid
hey my girlfriend has a 25 gallon tank with 2 blood parrots in it i've been talking to her dad and he said everything is zeroes except nitrite which is 3 and ph is 7.5. they have a 20g hang on filter and not sure of the heater but he said it was good enough. there are a few fake rock work things in the tank and 1 or 2 fake plants. they say the fish have been acting strangely i.e hanging out in the corners, breathing hard, not eating, spasming/seizuring and they are looking quite pale. they have had them 2 months or so and they have been acting like that for the past week or two. they have tried changed the water several times and adding a product to lower the nitrites but nothing worked. any help would be greatly appreciated.
its a half a inch of water and you think your gunna drown