Under 1 WPG is very low light. The java moss and java fern will probably be fine; the rest might not be, esp. the vals and pennywort, but I dunno.
As for ferts, read this article--it might be a bit easier to understand. The three main macros are nitrogen, potassium and phosphorus. From what I've read, good targets to shoot are to keep nitrates around 3-5 ppm and phosphorus around 1.
In my currently plant-free tank with weekly water changes, the nitrates in my tank stay between 10-20 and the phosphorus between 1 and 2. I expect those levels will go down once I get the plants in and they start sucking up the nutrients. I'll supplement nitrate and phosphorus if the levels fall below the target levels. I'll probably get some cheap "stump remover" source of nitrate and a good old fashioned Fleet's enema for phosphorus (seriously). You can buy bottled aquarium ferts (SeaChem makes a bunch), they just cost more.
There apparently isn't a good cheap home test for potassium so it's something to dose carefully and keep up with water changes, that way it won't build up too high (which usually isn't a problem). The API Leaf Zone that bkgodfrey mentioned is one potassium supplement (it also contains iron); there are others. Some people use NuSalt from the grocery store to dose potassium.
There are lots of different recommendations on ferts out there as you well know--llike learning anything new, just keep reading up on it and eventually it will all click.
Now, micros--that's a different topic. And sorry, I know nothing about UGFs/RUGFs.
As for ferts, read this article--it might be a bit easier to understand. The three main macros are nitrogen, potassium and phosphorus. From what I've read, good targets to shoot are to keep nitrates around 3-5 ppm and phosphorus around 1.
In my currently plant-free tank with weekly water changes, the nitrates in my tank stay between 10-20 and the phosphorus between 1 and 2. I expect those levels will go down once I get the plants in and they start sucking up the nutrients. I'll supplement nitrate and phosphorus if the levels fall below the target levels. I'll probably get some cheap "stump remover" source of nitrate and a good old fashioned Fleet's enema for phosphorus (seriously). You can buy bottled aquarium ferts (SeaChem makes a bunch), they just cost more.
There apparently isn't a good cheap home test for potassium so it's something to dose carefully and keep up with water changes, that way it won't build up too high (which usually isn't a problem). The API Leaf Zone that bkgodfrey mentioned is one potassium supplement (it also contains iron); there are others. Some people use NuSalt from the grocery store to dose potassium.
There are lots of different recommendations on ferts out there as you well know--llike learning anything new, just keep reading up on it and eventually it will all click.
Now, micros--that's a different topic. And sorry, I know nothing about UGFs/RUGFs.
