Phew, not working after all, stupid variable shifts, ok not read earlier posts;
Thinking about it while walking to work (and back

)
2 things;
Wonderng if dechlorinators, ie; the tetra bettasafe have use by dates or are eventually perishable anyone?
Could you check the container.
I think, although i may not be correct that the symptoms are too broad for a specific illness therefore must be related to stress which is normally due to poor water quality. Any experienced members or fish keepers, does this chain of thought seem logical?
If so:
You need to get to the LFS as soon as possible and get the SeaChem prime in his water quick, (is this futile or naive?) while there purchase the daphinia, get the water tested and as i or noone else has thought of a specific disease get some general tonic.
So heres your list;
LFS soon, get seachem prime, general medication (liquid), take sample of your waterwith you and get it tested,
Get home quick;
add half a capful of seachem prime to the tank, post the water stats the shop gave you on to this forum, check on the fish, if no noticable improvement in his behaviour after an hour, add another half capful of prime and add the recommended dosage of the medication.
Any members think this seems like the right thing to do?