wobbly zebra danio
one of our zebra danios is swimming a bit wonky. this also happened about 5 weeks ago to another danio just before we went on holidays & we treated the tank for internal bacteria (interpet anti internal bacteria med) as it was only slighly wobbly but listless & we thought this may be the best med. anyway that wobbly fish recovered completely. but we now have another showing the same symptoms. i dont know how to describe it but i'll try. it just looks a bit off kilter when its swimming .......slightly wobbly 8O is the term that springs to mind. we did think swimbladder probs but it doesnt seem to have the acute symptoms of 'classic' swimbladder disease. it reminds me of someone a bit drunk but its not very noticable you have to watch carefully. apart from being a bit 'wonky' it looks quite happy & is eating,chasing etc as normal. ive redosed the tank with the anti internal bacteria med as this seemed to work before for the other danio.
has anyone any ideas what this could be??? any help ideas etc MOST appreciated
37gal (UK) 44g (US)
3 tiger barbs,3 green tiger barb,2 peppered corys,5 cardinals , 2 pakistani loaches,5 cardinal tetras, 5 algae eating shrimps, 3 dwarf otos,3 black mollies,2 swordtails