Alright, got some pics, off to upload them in a minute.
Double checked the light, that is what I use. Also found a receipt from when I got algae chips for the oto (which I'll address in a second Chocolate :) ) and the tank is actually around 7 mos old, same lighting/substrate and still in the terra cotta (sp?)
To Chocolate: The oto I have was from a suggestion made by a friend of mine who is a successful betta breeder/keeper/shower (is that a word?). She told me she has been successful keeping them in all her tanks, and alone. Sadly, I don't have a 20 gal (so wish I did, but there's only so much space in here), and worry that the bioload on a 5.5 with more otos would put the cycle out of balance. He seems to be doing fine...so I'm not totally sure what to do with what you say. I've had him nearly as long as the rest of the tank. Probably 6, not 7 months.