06-29-2010, 05:14 AM
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Would agree with treatment of guppies in seperate tank.
Would also note that Male guppies in absence of numerous females, may continue to nip fins of other males as I attempted to point out in another thread.
Also note that tetras too,, often nip the fins of guppies and other fishes with long flowing fins.
Once fins are damaged, they can heal but ammonia and nitrites must read zero. Otherwise,,all the medications you wish to use will be ineffective. Non zero ammonia and nitrite readings are stressful to lethal for fishes and fishes under stress often succumb to various ailments including fin rot which can lead to secondary infections if water quality is suffering.
Is possible that fin nipping in this instance by male guppies or also tetras,combined with elevated nitrite levels worked to compromise the immune system of the fishes and led to possible infection though photos of male guppies I saw ,did not indicate this.
Also entirely possible that the female guppy, like the first female guppy, was stressed by the attentions of numerous males and succumbed literally from the stress.Four females to each male guppy is recommended.
Would also submit that the approx 16 gal Juwel Rekord? that the fishes were originally in , may not by design,, have sufficient surface area for beneficial bacteria to colonize in proportion to numbers of fish if they are too numerous. Might consider adding small sponge filter in addition to the filter built into the hood of the rekford if indeed this is the tank that housed or is housing the fish.
Would also consider that that neon tetras don't last long in hard alkaline waters that guppies enjoy and they like cooler temps than guppies and perhaps the black neon's loosing color would be an indication that water did not suit them.
Is often a snowball effect when water quality is compromised which leads to health issues with fishes we keep. Fishes placed perhaps unknowingly in unsuitable conditions (ie) poor compatibilty with other fishes, poor male to female ratio's , and most commonly,,, fishes that don't share same requirements with regards to water chemistry.
I have been responsible for the death of fishes too numerous to mention while learning that taking care of your water ,and researching the fishes needs before purchasing can save much frustration.
Study the fishes water chemistry needs,diets,compatibility with other fishes,and use quarantine tank for new fishes. Has worked well for me.