I am, I think, reaching the end of our nitrogen cycle (With fish in tank). Ammonia has been 0-ish for over a week, and while Nitrites were very high for a while, they have now diminished to 0.25ppm. Nitrates are still low.
Noticed yesterday that out 2 platies are 'gasping' at the surface, and I think have redder gills. I did a 50% water change and the gasping behaviour immediately diminished, and was absent this morning. We didn't feed them as usual this morning.
This evening, both our platies are gasping, as is one of the Danios. Gills still look red (Though our 2 Barbs and 2 cories seem fine).
Is it possible that previous high Nitrite levels have damaged them and symptoms are only showing now? Or is it more likely to be Oxygen issues? I've twisted the filter outlet so it is pointing up and therefore increasing oxygen flow. I'm also planning on leaving lights on overnight so plants will create more O2.
Anything else I should be doing? anything else it could be?
Many thanks in advance.
Noticed yesterday that out 2 platies are 'gasping' at the surface, and I think have redder gills. I did a 50% water change and the gasping behaviour immediately diminished, and was absent this morning. We didn't feed them as usual this morning.
This evening, both our platies are gasping, as is one of the Danios. Gills still look red (Though our 2 Barbs and 2 cories seem fine).
Is it possible that previous high Nitrite levels have damaged them and symptoms are only showing now? Or is it more likely to be Oxygen issues? I've twisted the filter outlet so it is pointing up and therefore increasing oxygen flow. I'm also planning on leaving lights on overnight so plants will create more O2.
Anything else I should be doing? anything else it could be?
Many thanks in advance.