Using an empty tank, with just the substrate in it, to start a carpet of plants like HC changes the "rules" we follow a little bit. Since there is no water above the substrate you don't need to be worried about ammonia or urea, so an ordinary garden type fertilizer will work. You do have to be careful not to over fertilize that way, or it will "burn" the plants. And, when it is time to add water to the tank you need to be pretty sure all of the ammonia and urea havae been converted to nitrates, which means several weeks should pass since the last use of that type of fertilizers. Aquarium fertilizer tabs should work fine too, without the ammonia issue.
Thanks guys, sorry I didn't check this for a WHILE!
--Well I have a 260w light on from 6:00 or 7:00 in the morning to around 9:00 at night, and it seems to be growing VERY good, but slow.
--I'm using ADA AMAZONIA substrate
--Obviously no co2 (emersed)
........and I forgot what else you wanted but that's pretty much it.
And for the other dude;
So your saying Fert. tabs WILL work??
(Sorry but I'd rather not chance it with regular fertilizer, I'm not good with that kind of stuff)
From what i have read i would recommend leaving the lights on 24/7, or so thats what they say. That should be the first step in the right direction. Also are you keeping it properly hydrated? A good misting should be done a few times a day or more. I am in the process of setting up a pvc pipe with some fine holes to a water pump on a timer so that it will auto miust it without the hassel of having to always check it.