HELP!!!

[RoyalRumble]

My partner has been gradually building her Tropical Community tank but one by one her fish seem to be perishing. The tank was bought just after the new year and is 60 litres. There is a healthy supply of plant life. At first fish seemed to be disappearing from the tank until we found the cause to be a Shrimp which was eating the fish one by one. The Shrimp was taken back but now the fish seem to be dying off one by one. The tank has been treated, cleaned, water tested but still the fish are dying. She has lost 4 Guppies and just recently 2 Gouramis for apparently no reason what so ever. If anyone has any advise on what 2 look for it would be greatly appreciated.

 

[babyfish]

Hiya, could you tell us more about the tank?
size
filtration
stocking level
nitrite, nitrate and ammonia levels
water changes routine
Makes it easier for people to figure out what might be happening

Oops, just noticed you did put in tank size, must read more slowly