I'm not providing a "theory" lol. I literally just gave you articles to read on the storage of nitrogen and phosphorus within algae. I am also asking you to find the exact point in the article rather than having to make everyone scavenge for it. Also, a question isn't an answer. You also don't seem to understand how energy storage works. It is stored for usage in situations where there is not a readily available source of it. This doesn't mean its unlimited. Also lipids are a form of nitrogen storage, just in case you didn't know. Same with ATP being a storage for phosphate.
Funny enough, the quote that I originally had was the wrong one as for some reason I couldn't copy the one I wanted from the article lol. It would just paste the one you saw and I didn't notice. The correct one is up.