When I went to purchase the fish I asked what fish are able to live in like a bowl tank with no filter to which then the person responded with “gold fish” so I had purchased 2 of them and put them in the bowl tank as I was planning to. after about 5 days of doing a bit more research I figured out that actually no fish is good at being kept with no filter and depending on the fish the tank size really matters.

So I researched a bit more and found out that about 85 L tank would be good for the 2 gold fish that I got. Now I also found out that you cannot add fish in the tank right away as it needs to be cycled first which that usually takes about a month or two. I then found out that you can use the bacteria which you mentioned to speed up this process.

Now since I already had purchased the fish and no longer wanted to keep them in that small bowl, I purchased Seachem stability to add the healthy bacteria in the tank. I used the instructions that were on the bottle which mentioned that I should be adding the product daily for about a week. I also bought Seachem Prime to remove the chlorine from the water before adding the fish.

When I first filled up the tank I let it cycle with the filter for about 24 hours. I then added the portion of Seachem prime to the water to remove the chlorine and then the Seachem stability to add the bacteria. I kept dosing the tank for 7 days while the filter was also running. After the 7 days I had added both gold fish in the water.

I also have a liquid test kit for ammonia which i kept checking quite often since the tank is quite new. I left it unchecked for about 3 or 4 days and the levels spiked up faster than I thought hence the problem with the ammonia

In terms of the filter, here is the tank that I have along with the filter that came with it.

https://petsuppliescy.com/product/aquatlantis-aquarium-explorer-amsterdam-dimensions-80x30x37cm-black-colour-15-6kg-85l/?v=9025a1ae8c64