Okay good, you're my new tank buddy! I was worrisome buying this tank because it seemed like a lot of videos were published reviewing this tank but gave me that "they're getting paid for this" vibes. So hopefully you don't mind if I message you once in a while to swap notes, haha. How long have you had yours? Is it all stock except for the InTank basket? How long did you use the stock sponge filter before switching, and did you also switch to a different material to put in the basket rather than the fluval brand? Also, did you add the protein skimmer? I've read a lot of like conflicting opinions but I decided to just go ahead and get it because it can't hurt, right? hahaWow! Sounds like you really have a grasp on everything! I LOVE my little 13.5, so you won't hear any complaints from me. lol
The only thing I'm not a fan of is the sponge filter. I recently did a big clean of everything, and needless to say... I went on Amazon and bought the InTank filter basket. I had my suspicions about the sponge filter from the beginning. It's almost like one half of it was filthy and the other was untouched. Hopefully I'll have better water movement with the InTank basket!