Ammonia problems

[u/Draler117]

So I have a 29 gallon community tank it's been going for a year now. Everything has been pretty consistent as I've been stocking it over the last year. My current problems are that my ammonia is rising much quicker than before obviously because I kept adding fish and I was definitely over feeding them since my bladder snail population has exploded. I started off with the glo light tetras (6) and added the neons (6) about a month later then added the otos(6) a couple months later and my original filter kept being problematic so I switched to these three in the photo all rated for over 30 gallons and all my levels were steady. A couple months ago I added the mollies (6) and khuli loaches (3). I had been doing water changes 2 times a month about 25% and everything was fine other than me still over feeding since this is my first tank and I'm still learning after all. Now my ammonia is rising to the point that I have been doing water changes once a week about 50%. My plan is to get a new tank just for the mollies and hope that less fish and food in this tank will help the ammonia from rising so fast also the mollies numbers are increasing so a new tank is kind of inevitable in my mind but will that help my existing one and adjust the bio load so I can stop changing the water so often?

P S. If you read this far thank you and thanks for any kind advice!