Water lilies exploding! Could it be EM?

My water lilies are exploding! She was never soo happy before - I still wonder what has happened. One plant, so many healthy leaves and so many flowers! 6 of the them at the same time.

 Recommended further reading Backyard Water Gardens: How to Build, Plant & Maintain Ponds, Streams & Fountains

The only thing I suspect is effective-microorganisms (EM) I have added in May to the pond. They are also beneficial to pond life including fish. Although water in my pond is not completely clear, plants grow much better now.

Have a closer look at this water lily - there are diferent size of leaves. Smaller are grown before I have added EM to the pond. Recently grown leaves are more than double in size.

Effective-microorganisms were described first in 70-ties. In general this is a mixture of microorganisms consisting mainly of lactic acid bacteria, purple bacteria, and yeast which co-exist for the benefit of whichever environment they are introduced, they "help to maintain sustainable practices such as farming and sustainable living, animal husbandry, compost and waste management, disaster clean-up (The Southeast Tsunami of 2004, the Kobe Earthquake, and Hurricane Katrina remediation projects)".

I can say, that beside water lilies boom in my pond, it works perfectly for places sprayed by kitties. I couldn't get rid of that smell on my favorite bag. When I read that EM has the ability of neutralising bad smells I tried it on my bag - and tadadam! bad smell is gone.
I have just read the article on wiki full of scepticism about effective-microorganisms, which I think I don't really get. It seems to work for me.
Any observations do you have?

 Recommended further reading Backyard Water Gardens: How to Build, Plant & Maintain Ponds, Streams & Fountains