modernhamlet
Just this guy...
Ok, I have had 75g and 40g mbuna tanks for 5+ years. Was a regular here for several years. I know about cycling. I preached cycling for years.
Yesterday, all of the fish in the 40g started coming to the surface, gasping for "breath". I tested and there had been a Nitrite spike to about 2.5ppm. This was completely out of the blue. This tank has had new fry as recently as last week.
I immediately performed a 50% water change (~1ppm), then another several hours later (.5ppm), and finally a third last night (>0ppm, <.5ppm). This morning they seemed a bit better, but this afternoon, they're back at the top and I'm about to lose 1 or 2 of them.
I've had no chlorine readings in all tests. Nitrate was initially at ~40ppm, now <5ppm.
I also did a water change in the 75g. The fish in that tank have shown no issues.
So the question is: Is this the effect of nitrite exposure that from which they'll eventually recover (as much as that's possible) or am I looking at something else entirely? If the latter... what is it?
Yesterday, all of the fish in the 40g started coming to the surface, gasping for "breath". I tested and there had been a Nitrite spike to about 2.5ppm. This was completely out of the blue. This tank has had new fry as recently as last week.
I immediately performed a 50% water change (~1ppm), then another several hours later (.5ppm), and finally a third last night (>0ppm, <.5ppm). This morning they seemed a bit better, but this afternoon, they're back at the top and I'm about to lose 1 or 2 of them.
I've had no chlorine readings in all tests. Nitrate was initially at ~40ppm, now <5ppm.
I also did a water change in the 75g. The fish in that tank have shown no issues.
So the question is: Is this the effect of nitrite exposure that from which they'll eventually recover (as much as that's possible) or am I looking at something else entirely? If the latter... what is it?