I have a relatively new tank 29Gal. It has cycled Ok but I have a milky look to the water that will not go away.
I am doing water changes etc. Anyway the point of this post is now my fish 3 black skirt tetras are all skimming the surface and will not eat.
Any ideas?
Do a large water change of at least 50% or more and increase surface movement as much as possible. If ammonia and nitrite are nill then you have a oxygen problem. Since you said there is a slight milky look to they water I would say you have have a bacterial bloom which is eating up the O2.
Do the fish look like they are "eating" air at the surface?
Can you give us more info: how long as the tank been running? How many and what type of fish? Live plants or not? How often and how much water is changed? Any "stuff" aside from water conditioner being put in the tank? What is the pH? And have you tested nitrates and what is the number (if you use the API nitrate kit, shake regent #2 for 2 minutes, not 30 seconds, before adding the drops)?
If it is a bacterial bloom, as seems likely, a water change will make it worse. Best to leave it. As long as the fish are more normal, they are fine.
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