Mollies Dying

[thecodfather]

hi all just a quick question

my mollies keep dying,ok they seem to lose weight up the back end and go very stiff as is they are paralysed,and also seem to lose there colour.i have one just laying on the bottom of the tank right now doing nothing,but looking sorry for itself,had water tested in two different places and they both said its all fine.but i mentioned salt and they tested that and it was high 3.6 opposed to 1-2 which it should be so i have done a 20% water change today to bring the level down slowly,wasnt thinking when adding salt didnt think about the level that was already in there and was adding my tanks worth not the water i was replacing's worth duh silly me,but i know now..

any thoughts,also thinking of getting an external pump and filter to sit under the tank in the cupboard

also they have a tank in wyevale(maidenhead aquatics) thats about 120cm(4ft) long,40cm(16inch)deep and 50cm(20inch)high for £369 thats tank,unit,heater,external pump and lights,seriously contemplating it.anyone now a better bargain else where..

ceri

 

[WILDER]

Size of tank in gallons or litres.
How many fish and which type.
Water stats in ammonia, nitrite, nitrate, and ph.

Fish looking really thin can be old age, internal parasites, fish tb, flukes, velvet.
Check the anus of the fish to see if its enlarged or red and inflamed.
What does it look like when the fish go to the toilet.
Any worms prutruding from the anus.
Lost any fish to bent spines.

 

[thecodfather]

Size of tank in gallons or litres. 70 litre
How many fish and which type. 6 mollies,2 sharks a guppy and a neon
Water stats in ammonia, nitrite, nitrate, and ph. as said in shop water is fine

Fish looking really thin can be old age, internal parasites, fish tb, flukes, velvet.............. not old only had them 2 weeks
Check the anus of the fish to see if its enlarged or red and inflamed.............................. nope all looks fine
What does it look like when the fish go to the toilet....................................................... brown some times pink
Any worms prutruding from the anus........................................................................... as above all looks fine
Lost any fish to bent spines..........................................................................
...............the mollies seem to belosing use of there spine as if paralysed

 

[WILDER]

What type of sharks are they.
With having the sharks the tanks overstocked.
If the fish were not born with a bent spine, or not old I would look into internal parasites to fish tb.
http/www.torrens.org.uk/NatHist/Aqua/disease/tb.html