1. I grew one in a vase with no water changes or lighting other than some sunlight for a year…basically nuke proof. Low light.
2. 50/50 on Javas. Sometimes they are flourishing and sometimes they die back, all in all a very easy plant though. Low light.
3. I actually have trouble with mine, but they are supposed to be pretty easy. Just give root tabs and strong light for 10-12 hours.
4. No experience
5. Not much harder than duckweed. I haven’t kept it but it’s supposed to be just as easy (but not as fast growing).
6. No experience, supposed to be rather easy.
7. No experience, supposed to be rather easy, needs root tabs I believe.
8. Very easy once it gets going. I have jungle Val. All it needs is a strong light (my first Val, corkscrew, died due to insufficient light from the stock light) and root tabs.
The nicrew lights are good and cheap. I have the aquasky, I love it (I was sold on the thunderstorm setting), definitely an improvement over stock lights.