Tiggerpal1989
New Member
We have a fresh water tropical fish tank- 80L with the advised amount of fish. Have had it up and running for about 6 weeks with no dramas at all, last 24 hours it just won’t clear. We’ve lost a fish & the others are clearly stressed. 2x 40% water changes calms them down but only for a short while before they go back to the top and gasp for air. All the tests are showing fine & filer is clean, what am I missing?