Wow great 10 gallon. This is why I like these journal threads too. It shows the development. You tried different things and found what worked and what didn't work. Now, with all the knowledge you have, you have a fantastic looking planted tank.
I'm not a big fan of guppies but the black ones and the albino ones are pretty cool. That is very lucky that you were able to get albino ones expectantly.
The tank has been in a 'rehab' mode after about a month of neglect... Well, I was away and asked my gf to take care of the tank, but I guess my instruction so to speak wasn't that clear maybe! So, some plants died, and a few HOLES to fill...
Oh well, maybe it's time to try a few other plants, let me know if you wanna help fill the holes in my tank!