I'm back... With questions!
So
convict360
has gotten me hyped about doing a nano planted (hubby also likes the idea of trying it with a tiny tank before potentially wasting money on a larger setup) and I was going to use one of my tiny qt tanks for it but my mother in law had a tiny little tank under her house that she said I could have, only problem is it has no lid (isn't that why they made perspex?

) otherwise it's a nice little tank, a few scratches but otherwise fine.. Now, for my never ending list of questions...
1. Can anyone suggest a nice substrate for planted tanks? I've read about the tropica substrate and am leaning towards that but if anyone has a better suggestion I'd love to here it!
2. Lighting, this is where I get confused, all the PAR and wpg and everything else is a little confusing.. Can anyone give me a link to an article that explains the idea of PAR in "simple" terms? I've read the bit in the planted section (and the various links within) but it feels like I need to be a scientist to understand it all, same with most of the info on plantedtank.net...
3. Co2, can anyone recommend a "cheap" kit that will run a 30ltr happily? I don't mind paying a bit for the actual kit, but would like something cheap to run. NO DIY! It looks so fiddly and confusing so I'm avoiding that road...
4. Is it possible to have a planted tank without fish? I honestly don't know what I could/would keep in a box that small so I'm leaning towards a fishless tank, is this at all possible?
Thanks in advance.