after all the hell I have been through this week, today I turned on my lights and noticed I have aton pf pink and purple coraline growing on my overflow box and the back of the glass. for some reason in my fish only tank I could never get the stuff to grow. this kind of made my day . everything looks so good today. everything is in full bloom and the water readings are still at zero. by the way david I can't get a hold of ou when you are not at work pm with your number or I will give you mine, thanks