A few months ago my CO2 regulator valve died and almost took the fish with it. I decided to forgo the CO2. I have some bucephalandra and they started to get hair algae as the plants that required CO2 faded away. I added a few less demanding plants to suck up the excess nutrients and started using Seachem Flourish Excel which provides some bio-available carbon and seems to depress the algae a little. I also started using Seachem Flourish Advance Growth Supplement which has some plant hormones that can stimulate root growth.
It took a while to eradicate the algae. I had otocinclus, nerites and shrimp on patrol but with the excess light and nutrient build up it was an algae-tastrophy waiting to happen. It took some time and a lot of muttering but it finally turned around.
My tank is a little on the wild and disheveled side. I have never really had a carefully manicured tank like some of the incredible ones I see on the international aquascaping contest websites, but maybe one day I will. Still, the tank is healthy. I spend some time watching it every day. It is relaxing and I have always enjoyed watching the fish and other critters doing their thing.