Nice tank! I love that O and creamsicle devil, too. Glad you found some tall plants. You can search on amazon too for "XL" plants or put in a size you want and see what comes up. For sure they have 18" tall I had some of those I mixed in.I just wanted to update and thank everyone for the suggestions. I went to Michael's and while I did find some cool stuff for pretty cheap, I didn't find anything that was tall enough as I wanted.
However I found these aquatic plastic plants on Amazon for $12 ! Pop and couldn't pass them up.
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The garlands are great too, you can wrap them around a log or repti-vines (the waterproof ones). That's what I use along with live pothos.
How big is that O? And size of tank?