Yellow leaves, bites taken out of leaves, white spots. Please help!

I checked my potted(18 gal) plant yesterday and found a lot of dead & half dead fan leaves with small red spots inside the veins on the back of yellowed leaves, I searched for mites or pests and couldnt find any. just starting flowering a couple weeks ago. there are also white spots on some leaves not many though. I do not feed it any sort of fertilizer just water from my pond(not stagnant). any help is appreciated. heres some pics
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Any ideas?

Rootbound...

oh a catapiller or slug munching

wow man you sure? think i could put that bitch in the ground without shocking it? i checked pretty intently for slugs and pillars, but im going to check in a lil beacause they sleep on the soil, in a little ball.

Almost positive..the roots want to be as big as the canopy. Get a really big pot. Put soil in the bottom and move plant without messing with the roots. then back fill. Gonna be a good one when she expands.

i dont have a bigger pot or soil man but ill probably look into it, thanx