You did get a lot of growth from just 20 days, just a tip, most folks at our plant club use wooden air stones as difussers, I think because the others clog and are hard to clean but you can stand the wooden air stone or spend $1.99 and get a new one but the bubble are very, very, fine.
Amanos are great cleaners but ghosts won't clean.
Just keep your plants trimmed up after they grow out to keep some circulation in the tank but it looks go so far.
I have been using up a up aqua diffuser. I got two of them so I can rotate them out. That sucks about the ghost shrimp I might get some rcs sometime. I think that the tank is planted enough now that they will be fine from the tetras.