i hate tinfoil barb

[ado124]

well sorry for the late ..

the tank is 110 Liter

fishes : group of adult angels + marbled red tail catfish + shovelnose catfish + severeum + high fin shark

i do only 25 w/c with no conditioning ( i know that it is hard to just put water from tap directly ) but i do that long time ago except in winter i have to heat the water to 27 C first so the heating Evaporate the chlorine ..

but i do that to all of my tanks and most of them is American cichlid and some cats and african cichlids

our tap water ph is almost 7.5

the temp is the same 27 @ both ..

but to be honest i do not measure the ph or the nitrates in tank as i do w/c every week

I know you say you've been doing this for a long time but i feel that this is the culprit. I've tossed tinfoils from tank to tank with 10+ degree differences, huge pH differences, and have done 50% WC on a 20-30g without issues. they are as hardy as they come.

I myself hate them because they're vacuums and won't let my other fish eat.

 

[MadBob]

I'll let people who enjoy yelling at each other about tank size do that here, but seriously man if you're going to buy exotic fish learn a little bit about how to take care of them, use a water conditioner, and test your water periodically just so you know what's going on.

If you ask questions and then admit that you don't have a clue what's going on right in front of you, it frustrates the people trying to help you, and really makes you look foolish.

What I can say for sure is that your tank is grossly overstocked, and that's the root of your problem.

for readers who aren't familiar with metric, a 110l is the same tank we call a 30g

 

[MonsterMinis]

What I can say for sure is that your tank is grossly overstocked, and that's the root of your problem.

for readers who aren't familiar with metric, a 110l is the same tank we call a 30g

That large of a bio-load would be intense, and very very small room for error. By adding new fish, that are already stressed, use to clean water. Then exposed to fluxes of this capacity. even with a "cycled" tank the water itself is gonna go threw some major use/reuse and 25% once a week imo is not enough to keep it balanced. Likely your going threw some major swings. and your current stock is simply just use to it.

 

[peewee]

whatever makes you happy man

 

[Allan01230]

Definately something is going on with your water. Tinfoil barbs are as bulletproof as they come. I don't use them in any tanks anymore because they get so darn huge so fast. I prefer filament barbs to tinfoils.

 

[SteveR]

well sorry for the late ..

the tank is 110 Liter

fishes : group of adult angels + marbled red tail catfish + shovelnose catfish + severeum + high fin shark

i do only 25 w/c with no conditioning ( i know that it is hard to just put water from tap directly ) but i do that long time ago except in winter i have to heat the water to 27 C first so the heating Evaporate the chlorine ..

but i do that to all of my tanks and most of them is American cichlid and some cats and african cichlids

our tap water ph is almost 7.5

the temp is the same 27 @ both ..

but to be honest i do not measure the ph or the nitrates in tank as i do w/c every week

BINGO! I think we found your problem. Your tank is completely unacceptable for the fish you have just listed. Research!

A RTC or TSN will barely be able to move in your tank soon, I honestly feel you have a blatant disregard for the life of the fish your keeping. Ignorance is not the key. Use google and start reading about the fish you own paying attention to the adult sizes of these fish and what sites are saying about minimum tank size.