7 lampie tetra, 1 plec, 4 guppies (inc the ill one) and 1 swordtail.
We've been told it's a swim bladder problem so we're going to buy the swim bladder medication. Should we do a water change before adding the medication and with the filter (as in the carbon bit) we're not too keen on taking it out as last time it made the surface of the water splash around a lot and we don't want to stress any of the other fish out.
Also the yellow guppie has some black thing on it's tail. It's on the very tip and it's swimming normally so we're not worried, just curious as to what it could be.
If the carbon is less than approximately 8 weeks old IMHO i would take it out (maybe you can replace it with some other media to prevent the splashing [I am not familiar with your filtration device]).
I am saying this as if the carbon is still active it will probably render your meds useless.
I have tried fancy show guppies in my tank and contrary to the literature they have been the least hardy fish that I have owned.
I have abandoned trying to keep, breed or raise them.
you should take the food and place it in a tiny container, the lid to the food is great. Fill the container with water and wait 1-2 minutes, then pour it into the tank, this way there is no air in the fish food and it will lessen the chance of swim bladder disease
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