Like LAKA and Bigstick (and my few years experience wit a few tanks to maturity and many experimental short term tanks), I have a high degree of certainty the typical dry fertilizers you are dosing did not induce greenwater. Mind you, I am of the opinion coincidence is BS and see why you are relating the GW to dosing, I'm just saying it was coincidence and a spike in GW friendly nutrients (like Ammonia or Ammonium from a dead fish) or someone else's GW induced your GW. The tricky part about GW is single celled algae is silly adaptable and even without NH3/4+ (say from plant uptake and water changes) it will just consume something else and survive. At this point dosing hurts you but for gods sake care for your plants. Still, LAKA posts goodness and you should put much weight behind that advice.
If still skeptical, get some cups and dry dose into them, then put it out in sunlight, then put a plain water cup out there too. Decent trims of good plants says if you get no GW in the plain water sample you ain't getting it in the dosed samples either. Regardless, if you have spare Aquasoil type II, too, thats an interesting test you should post pictures of.
And continuing that tangent, please forgive my continuing the troubleshooting: In another forum (AA) someone suspected KNO3 dosing of causing his/her cloudy water. I've used KNOW from Greenlight Stump Remove, the grainy stuff Greg Watson used to sell, reagent (4 9's) stuff, 1337 dusty stuff turbomkt scored, and the small granuled stuff Rex currently sells, and just about as many K, P, and Ca sources, and TMG, Flourish Comprehensive, CSM+B, and Microplex (the green is so pretty!) over the years, and none of them cause GW. (The only fert I have used that has was agricultural grade Calcium Ammonium Nitrate.) These were pics proving this point with the stuff I currently have on hand:
http://wet.biggiantnerds.com/logs/images/stuff/kno3_po4.jpg
http://wet.biggiantnerds.com/logs/images/stuff/k.jpg
http://wet.biggiantnerds.com/logs/images/stuff/fe_tmg.jpg
http://wet.biggiantnerds.com/logs/images/stuff/csm_fe.jpg
We all really really want you to beat GW because most of us have been there. It's probably not the ferts
I have never used Eco-Complete, but as I understand, it contains no macros and only has rich amounts of certain micros and high CEC (the ability to grab abd eventually make available to plant roots ions, for example Fe+, Ca+, etc from the water column). Bigstick is right. (From Bigstick's plants and my old days on APC, fwiw, you should listen to guys like him. No offense, just typing
)
I hope this helps. Beat it.