Too much light can create a algae problem real fast. You have ammonia readings, so they are coming from somewhere if your tank is cycled. I would guess from the tap or from too high of Nitrates (waste, overfeeding)
_________________
"There he goes - one of God's own prototypes -
a high powered mutant of some kind never even considered for mass production.
Too weird to live, and too rare to die".
Fear and Loathing in Las Vegas
Subject: Re: Water Problems 
