Anyone keeping planted aquariums?
I no longer have a planted tank as I traded them all for reefs but I also sold plant cuttings.
For lighting, I found that almost any bulb would grows plants, but to bring out the true colours and get real growth, T5HO's or VHO 6500K would do the trick.
For substrate, I always went with an inert top gravel/sand and a soil underlayer. It sounds crazy but a lot of planted tank lovers do It an a quick google search of "Dirted planted tank" will brig up more info. It's a great substrate that makes the colours come out great and growth explode!
As for CO2, I'm a BIG fan. I ran planted tanks for many years without CO2 and got decent growth and colours, I then decided to dabble with a DIY reactor and was instantly hooked. It promotes amazing growth and colours and also surprises you with oxygen bubble streams coming from every leaf, this is also known as pearling. However, using CO2 has a danger, if not controlled properly, you can easily gas your fish from an overdose or cause drastic pH swings.
In my old forum, we used to see who get get our plants to pearl first after lights on. Plants pearl when they are photosynthesising at a rate so great, that the oxygen cannot dissolve into the water quick enough and so a pearl like string of bubbles spew from the plants.