Betta Fish: Idk what to do or why/what is happening..

This is my boy, Fredrick. I've had him a couple of months and the more I dive into all of the betta needs that I was NOT aware of originally… It seems like the more I do that is supposed to be in his favor, it's hurting him.

His tank… Stinks. You can tell it does just looking at the pics! It looks like pee water!! We are not pee water having PEEpole (Fredrick's bad attempt at a joke he told me to throw in to make this post a little more light hearted!) or fish in this home! I'm doing 30% water changes every couple of days. The ammonia levels are at alert. I have to get an actual test but for now I have these stickers on the side. To keep it the ammonia levels down I have limited feeds for him because I think I was causing them to spike I overfeeding before. The filter is a crap filter. It bubbles. Unless something else is causing this.

I spend a lot of money on plants only to find out that I needed to buy things to keep those plans alive and thriving in my tank so all of those tank plants have died. I went and I paid another $40 for the ones that I have in the tank now and I also got the tablets you're supposed to bury underneath substrate. Now my tank is starting to smell ammonia again and it's so strong that when I'm doing water changes if it gets on my clothes I can smell it on me.

Now, look at Frederick. The first picture I posted was a few weeks ago he was thriving and beautiful. But, now if you see in the video he's at the bottom of the tank hiding and his fins look like he's getting fin rot.

Help me please. I love him. I'm trying. He looks unhappy though.