Gold Fish keeps dying

[Kulstud2]

Hello everyone. This is my first time in this forum. I need some advise on keeping goldfish. In the last few months I had 3 small goldfish in a XL sized bowl without any filteration or oxygen. The water was changes every 3 days. But they got well.

Recently I bought a 2 feet aquarium. basically I used filtered water as usual add in some anti clorin and used the same pebbles. This time I added small filter and air bubble system. When I transfered the Godlfish they all die on the next day.

I cleaned the whole tank and bought some gold fish again
The next day they also died by next morning.

Then I bought 2 big goldfish, each cost RM5 again by morning they were floating upwards and pass away the same day

Then i cleaned the tank pour more anti clorin (half a bottle) and put 3 more fish, 2 gold fish and 1 angle fish. The 2 gold fish died again. The angel fish died after 4 days.

I now dono what to do... why is the gold fish dying. The tank is now 10 days old and I have bought 2 udang instead now.

Can someone help me.. goldfish is so nice to keep, how come in the little bowl they survived but in a bigger space with filter and air bubble they dont>

Thanks

[bubbleboy]

I think you're using WAY too much dechlorinator. I guess it depends what brand you're using. Did you follow the instruction? I don't know the volume of your aquarium but if it's 2ft long, I'd say it's in the ballpark of 15~20 gal. I'm using Aquaplus by Nutrafin, and it only requires 5ml/gal. I don't know how big the bottle is but half a bottle seems abit too much.

Also, some reading of water condition (ph, ammonia, nitrite) would be alot of help.

[GoFish]

Have you consider to keep the water for three or four days while turning on the filter and air bubbles. Then test the water.

Buy fish put them in the tank the fourth day.

Gofish.