Try spreading out the WC a bit unless you have high bio load...
No CO2 and one bulb could be a good low tech if treated carefully.
Get some shrimp in there... Amanos are good too.
Don't go for liver bearers as a hair algae deterrent. SAE will just get lazy and want food later in life.
Shrimp just wanna eat and seem to clean all day long unless heavily fed.
Algae will take a hold of trace ammonia even if other things are not added to the system. Try keeping some good bio media in the filter and see if you can balance things out.
Adding ferts to a system such as this just means less is required. Without a bunch of light feeding the cycle there is not a huge demand.
A decent comprehensive plant fert can keep things rolling. Just don't use too much. Remember things will grow slower.
Good luck