Hi,

I am a fairly new tropical fish keeper with a 60L heated BiOrb. Looking in
my tank at the moment I see one of my two male guppies is in a really bad
way, he has sunk to the bottom of the tank, his gills are moving and so are
his fins but he's not swimming. There is no sign of any abnormality.

The tank has been established for about 4 months and the guppies have been
in it for about 2 months. I also have 5 Neons, two ram cichlids and two
small loaches.

I recently had a big algae problem but that's been sorted for a week or more
now. None of the other fish, including the other guppy, look sick.

I've serviced the tank regularly and feed once a day with pellets and/or
flake. The temp is in the green zone of my thermometer at about 27 degrees.

Has anyone got any idea what may be wrong with him and should I leave him to
see if he perks up (not looking likely) or remove him from the tank now so
as not to risk the other fish?

Many thanks

Dave

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