Wet/Dry fitlration on my 100g tank, anything else I need to add?

I have a 100 gallon tank that I bought used that will house a single oscar and perhaps a small group of smaller fish, I'm thinking 6 silver dollars or 6 geophagus tapajos, or perhaps 3 severums or blood parrots.

The aquarium comes with an integrated wet/dry system with blue bioballs, because I think this system was mainly meant for saltwater aquariums (the brand is SeaClear system 2). I t does seem that this media/method of filtration is very old school right? I see people were talking about it in the 90s-00s, which makes me think the tank design is really old (will reinforce every seam with weld-on 40.)

I really wanna try to use this filtration method because I would save a tremendous amount of money, as an FX6 is so expensive. Instead, with this all I had to do was to order the drip tray that was missing, for $30, but I wonder if in 2020 this method of filtration is still good, or if I should complement it with newer, more modern media. I was thinking perhaps these? Reefing Art Ceramic Bio Filter media Vast Surface For aquarium sump Canister | eBay Also lots of sponge for prefiltering.

What do you think, in this day and age, do you think this filtration method would be enough for my tank? Is this method of fitlration easy to maintain? Should I complement it with perhaps a small canister filter, extra media like ceramicor seachem matrix, or would it be enough on its own? This is the first time I'm stepping into the big leagues, before this my biggest aquarium was a 40g with a 406 canister.

Any tips/suggestions/wisdom from you veterans that have used such a kind of filter is really appreciated. Seems simple enough yet complicated at the same time, at least for someone that has used only hang on backs and canisters.

These images illustrate the integrated filter, it is the exact tank that I have:

 

Yes that filter will work. This tank is acrylic? Wet/dry filters work they are today’s sumps. I used a wet/dry for years and never had a problem. Yes that’s an older tank. The thing with them is it started out as a 100g but when they added all that stuff to the back it takes away from the tank. It may only hold 75-80g now for the fish. What are the dimensions?
No idea why wet/drys aren’t used anymore. Just know where the prefilter sponge is and how to remove it. Because that will need to be cleaned on a regular basis. But that’s it. Also you’ll probably want to change out the pump and put something newer in.

 

I've never ran an overflow system, so take my advice with a grain of salt. I've read several horror stories on the MFK forum, where pumps on sump systems, attached to XL tanks, have malfunctioned. The results were catastrophic.
Personally, I'd remove the overflow box, install a bulkhead, then run either 2x AC 110'S or a solo XL canister.

 

Thing with that system is it’s behind the tank not below it. To do what you want you just lose all that space in the back. If your overflow is set up correctly when the pump quits the amount of water flowing out should stop when the wet/dry is full. I also had an air pump pumping air into the bio/ball rack. That would help keep the bb alive in case of a pump failure.

 

Thanks for your replies guys. Yes the back part cannot be removed, the panel is fused, it would be a really bad waste of space not to use it. The tank is 5 feet long, and about 18 inches wide, it does become narrower at the center due to the integrated filter, reducing it to about 14". I thought about the oscar having difficulties turning around when it reaches maximum size, but if that comes to happen, I shall upgrade.

I have ordered prefiltering sponge, there's quite a big of space for it at the beginning, a space of about 19x4 inches, so I've ordered plenty of sponge for this.


WhatA201 said is the only thing that worried me, in case of a power outage, a big part of the bioballs would remain in the open air without water supply,. Let's say there's a power outage in the night, I could wake up and all my bacteria could be dry and dead no? The system does have a small nozzle for injecting fresh air into the bioballs, see number 6 in my original post's image. I plan on using that then!

What do you think about converting it into a fully submerged sump?completely filling the back compartments and removing the drip tray? Is wet dry superior to fully submerged sump? Some more photos of the system: