Anubias nana is turning yellow/rotting

Hi all,

I'm new to this sub, so excuse me if I'm a newbie (of which I am).

I have a fully cycled, 5.5 gallon for a planted shrimp tank in the office. I have two new Anubias nana in there that I have tied down to a slate rock. I treat every three days with Flourish Excel (.5mL). The temp is 76 F.

In the photo here: http://i.imgur.com/VSoyhelh.jpg

My little Anubias' both have leaves turning yellow/brown and seem to be rotting away. It's literally been 5 days since I put them in.

I originally put them in a 1 part bleach, 14 part water solution for 10 minutes to clear them of any hitchhikers.

I have this light for the tank thats on for 10 hours a day and not on weekends. https://www.amazon.com/gp/product/B00LMH10HC/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Could someone help me figure out what's happening here? I'm supplying CO2, the water is cycled, there's light, the temp is right... I haven't even put any stock in the thing yet.

Thanks.