I'm considering trying out Flourish Excel instead of CO2 in my 2.5 gal. nano.

Plants are hairgrass and riccia (tied to stones).

Light is 24w PC T5 - 6 hour photoperiod
I dose KNO3 and TMG with each water change (50% every other day).

Would the riccia be ok? I'm not bothered about pearling. I figured growth rates would be a lot lower, but would there be any other consequences i.e. algae?

Your thoughts most welcome.