I have 4 tetras in 10 gallons tank, had them for a year.
lately i start to experience two issues what i suspect are connected.
All tetras are keep moving there mouths. kinda resembling heavy breathing.
It couldn't be oxygen -- it's only 4 of them in the tank. And air filter seem to be working all the time.
They seem to stop eating - i tried 4 different types of food including the kind they ate before. they show interest but not taking it.
green slime keep growing rapidly. water become cluttered and stinky very quickly. walls are covered with it . Here are the things I'm trying :
Clean walls rocks and accessory (no live plans)
Replace water often (25% - 30% at the time)
Salt (according to instructions)
Replace filter cartridge
Ammonia and chlorine removing conditioner
Test shows what PH is 6.5 and amonia is normal
any advice? email is prefereble email@example.com