Mr. PlantBrain - K vs P limited?

[famman]

I'm sort of getting this plant thing figured out. Well, sort of.

I have a 20 gal high, pH7 / kh3 / 78F / 30 watts florescent, DIY Co2, 5-20ppm nitrAte, lightly to medium planted.
6 corydoras, 5 otos, 2 danios, 1 neon.

I don't need to dose nitrAtes yet. Being the mad scientist I am, I dosed with Sodium Phosphate before I knew what I was doing and now I have a beautiful tank of mildly green water.

This is an indication that I'm K limited, right?
Do you use 'Grant's' Stump remover? Or in this case could I just use nu-salt since I don't need the nitrate?

Can you give me a quick link to a few relevant articles to help clear my brain?

many thanks,
:)

[djlen]

You don't use KNO3 for Potassium(even though it has it in it). Yes, use KCl(NuSalt).
Your green water could be an indication a few things. A good water change will clear the algae. Then adding the K (NuSalt) will tell you if that was the problem. You only have 11/2watts/gal. which is good for now because the tank is lightly planted. But having just a few plants could be a contributing factor.

Len
Edit: I've been trying for 10minutes to include the link for Tom's info here with no success. So I'll just give you the address and you can search for his info when you get there.
www.sfbaaps.com