39

The most reasonable explanation is that it died and was eaten by the other fish / snails. Note that some snails are carnivorous. Many fish are cannibalistic if the opportunity arises. Some leftovers of the missing fish might be found inside the aquarium, if you look carefully. Or in the filter. Some fish have the idea to jump out of the water. With this ...


3

The first thing you need to do is to add some aquarium salt, this is done to counteract the effect of the nitrite on your fish' gills. The aquarium salt concentration to use is 0,3%. Do water changes 20% each day until the nitrite level drops, cut down on the feeding of your fish so you only feed twice a week and only a little food each time (this is to ...


2

I don't think it is possible to easily know this for sure, both because of the often non-specific symptoms of toxic metal poisoning and the fact that an aquarium is a complex biological system of interconnected vessels which could be all simultaneously affected by their toxic action and thus present ambiguous results. Mentioned diagnosis difficulty is also ...


2

Bro... You didn't change the water for a YEAR? Plus the tank is too small. What happens is the poop they produce creates levels of different stuff in the water, like ammonia and nitrogen, and too much of the latter will cause permanent brain damage. The other also has negative effects and this can stunt growth. Having a small tank also stunts growth. Your ...


2

In short - yes you can, in the market there exist a lot of various fertilizers with specific macro- or micronutrients. And yes, aquatic plants are not really different from terrestrial plants in terms of nutrient requirements. However, both in case of aquatic and terrestrial plants, it is a little more complicated. For example, it is true what you stated ...


1

Pushing nails or similar size bits into the gravel , make sure the are not galvanized. They will turn red/brown with rust fairly fast but being buried they will be out of sight. Another very fast possibility is putting a small bit of steel wool ( NOT with soap) into the filter system. You give me an idea; long ago I grew cryptocorne so well I sold it to a ...


1

Why would metals be a problem in an aquarium ? Just don't put in anything with copper. That is pretty easy as copper alloys are red /yellow color except monel which is not common and expensive. Copper is toxic that is one reason is is used on ships to reduce fouling by organisms. For there to be a problem the metal must dissolve or corrode to put ions in the ...


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