Is this enough Filtration?

[Aqualoon]

Standard 125g Tank - 40 fish, not quite fully grown yet.  No issues thus far, just want to make sure I don't run into issues and if my filtration might not be up to snuff when all these fish are adults I'd rather be proactive rather then reactive.

Current Filters are 2 x AC110 and 1 x SunSun 304B

Had a FX5 on another tank years ago, liked it well enough so if my current equipment is on the low end and might have some issues would an FX5 or 6 + 1 x AC110 be a better solution?

[finadic]

FX6 sounds like a good way to go, It's working well for me. I'm currently using 3 of them & one on my 125 & seems to do well even under a heavy petro load. I put in two 1000ml Sera siporax media bags in one tray, & two Chemi pure blues in another along with Eheim coarse & fine pads 2217 size added along with the FX6 carbon pads on top & white side ring pads, & clean once every 4 months. I also put in a 2-3 capfuls after each water change of API Quick start to help replentish the bacteria colony. Always seems to add a nice polish to water by the next day. Hope this helps.

www.amazon.com/gp/aw/d/B000A215HK/ref=yo_ii_img?ie=UTF8&psc=1

[Aqualoon]

Is that your only filter on your 125 gallon?

I ask because I'm moving my tank to the living room to be kinda the center piece of my house and if I could cut back on the filter intake tubes that would be awesome. I'm getting a 3D background so the less tubes showing the better.

[Mastiffman/ Duramax7Man7]

FX5 or 6 is ample enough. I have one on each of 5 different tanks. Great filters is setup properly.