Down here in FL we have phosphate naturally in the soil, and also in our well water. So I tend to buy ferts with a low middle number. I do use MG for my potted plants, most of which get watered with tap water. In some plants, not EE's of course, too much phosphorus can inhibit blooming, so we have to watch out for that here. We also have a fertilizer ordinance against the use of any fert with nitrogen components between June 1st and Sept 30th so everybody puts down the best slow-release stuff at the end of May to last through the summer. I'm right with you on the 'natural' fertilizer method, Sway. It's so much more difficult for girls, though. Hm, need to re-train my husband.
As far as the Aroids forum goes, you're right, it is pretty slow there. Susan said it best, it's more casual and friendly here. Hardly anyone posts pictures on the Aroids forum, and most of the comments are in the form of technical questions for LariAnn. She is the greatest, but she's too busy to post much (which of course would make things so much more interesting).
I'm a firm believer that pictures keep these threads alive. Try to post a picture each time I post, but, you've all seen all my Ears just in the last week! I need to go get a new picture of my neighbor's Xanthos in the ditch - they're twice the size they were before we got rain!