Whole Stack Of Problems

[lewismorris]

size: 150 litres
temp: 26 c
inhabitants: 4 marble mollys, 4 baloon mollys ( now 3 after todays death ) , 6 neons , 4 guppys, 1 white molly , 2 silver sharks , 1 parrot fish

chemicals used : 'bacterlife' weekly cleaning treatment oxadised nitrates etc

problem:

this morning i found a dead molly on the bottom of the tank with red ( what looked like grazes or red soar patches ) on its gills , and its fins eatn... my dad said he saw the parrot fish ramming the molly at the bottom of the tank. these red marks are also found on 2 other mollys .. these mollys are getting really skinny , they have large heads but there bodys are shrinking. they seldom eat food and today i saw them being bullied by other fish. Another marble molly has started to grow a white fluffy spot on its head and other mollys have white bits appearing in their fins. the parrot fish also has started to get while patches on his side and gills.

The tank used to be full of excitment, with the fish always at the front of the tank, now they hide away....

please could some one help , there seems to be something wrong with the whole tank and i really dont want them to die..

i purchased some anti fungus and finrot treatment, should i use this or can any one please help

this is an image of the parrot fish , you can only just see the extent of the white marks

this is the baloon molly , you cant really see the red marks but can see his fins

[img]http://img512.imageshack.us/img512/2702/30wd1.jpg

more




this is the while molly with the worst red marks which still arnt as bad in the picture as in real life, you can also see how skinny he has got.

[img]http://img252.imageshack.us/img252/886/47oc.jpg

please if anyone can help i would be so gratefull


thanks in advance lewis

 

[WILDER]

Need water stats in ammonia,nitrite,nitrate, and ph, that might explain the red gills, you have a bad bacterial infection in your tank, and the fish have columnaris i would recommend a water change then add the med.
The tank is way to small for the bala sharks as they are fast swimmers and like to be kept in a shoal.
Fish going thin, have they gone thin through not eating as it's important, as there is two nasty desease that can cause this, also check the fish for bent spines.

In a pic looks like on the the fish has a sunken in tummy.