Green water early battle

About mid week ive noticed my 29g heavily planted tank get somewhat cloudy. I right away thought it was due to the ferts i added (First introduction of flourish nitrogen,potassium, phosphorus and iron) and thought it would clear up in a few days.. well this friday it started turning somewhat green so i did about a 30% water change and decreased the hrs the light was on (to 7hrs). The ammonia was 0 and so were the nitrates. The tank didnt at all get better so today after reading up a bit on Green Water and what exactly it can do to a tank I went straight to action and did another 30% water change and covered up the tank for the 3 day blackout.
Any tips on solving this problem??
Should i do small water changes during the blackout?!

Thanks for reading and for any help.

edit: forgot to add, probably the important part to this too. The tank gets some window light for a few hours during the day, nothing big but maybe enough to cause a problem.

thanks jaysen for your concern.. I dont think 3 days will hurt the plants. Read on one site that i can check the tank midway to see if its clearing up, if it cleared up 100% already then im done if not continue till its 3 days without lights.. Compared to some of the images they got on the web of green water, mine is maybe slightly green so hopefully it will go away faster

grannylvsfish said:

does flourish excel take care of this problem? I know it killed all the algae on my 10 gallon when I used it the first time.

Click to expand...

read that it does help but i got vals and other plants that it might kill :huh:

Thanks Mg will do
But still have to figure out what sparked this.. Either the window light or adding Flourish N-P-K and iron all at once or both at the same time.

The sunlight issue is easily resolved with the shade so I am good there.
But for future reference, would it be best to dose the tank with all ferts at once or space them out to different day doses?