[rohape]

I am SO jealous!! That looks awesome.

Are you using the filter just for water movement and still all the elements of NPT?

 

[rohape]

Are you having trouble getting the floating plants? I have some Water Lettuce if your interested. I could send the "mother" plant with a nice 14" root.
Along these lines, if your having trouble getting floating plants I have a LFS with plenty of Hornwort I can swing by and grab.

I would think removing the carbon, do a water change and adding some floating plants would do it for you.