New to the forums and new to larger aquariums

Hey everyone so I'm new here let me start with hello, the center brace broke on my 55g so I went ahead and upgraded to a used 120 acrylic, unfortunately it came with no filtration and being handy as I am I took it upon myself to build a filter. It's basically a two chamber setup (mechanical/bio) powered buy a 620gph sump pump. Will this enough filtration and do you see any flaws in my system? It's my first attempt at a filter. I added half the media from my c-220 to help boost the bio cycle.

No petco is replacing the 55 it will stay a tank and go in my bedroom, I'm going to stick with the filter I built if you guys feel it will do the job, sumps are still very new to me so I'm not quiet ready to take that leap

Right now it has 300 bio balls and 500g of ceramic, I will add another chamber to it if needed, I designed it to be expandable

I figured it holds about 3 times the media of my c220 (55 gal) and 3 times the flow which I thought may be ok.

Thank you, I will do that and update as I go.

After the talk about my lack of Bio I had an Idea at work to add some extra bio media to the tank and a bit more flow so I attempted to make a on top wet/dry trickle system using plastic scrubbers as media. The flow is provided from a 160 GPH sump that heads into 4 spray bars which allow the water to trickle though the media than through the drawers and into the tank.