I might be exagerating a little

I am making water for my 8 2-liter bottles, as well as my friends 5 - 20 oz. bottles. In an attempt to stop the crashing, I have been rinsing every bottle with strong bleach, and then mixing water as Ed prescribed with 1ml per gallon and de-chlorinating before use. I have noticed that Prime seems to slow the initial growth by a few days. I tried one without the bleach in the water, and it grew very quickly, and never crashed. James' water that I make doesn't get extra bleach in the mixed water, because it has fertlizer already in it when I give it to him. His truly are bullet proof! No air filter, no bleach on the lines in the bottle, no bleach in the water, old used floss...etc. etc. But no crashes.
I'm starting to wonder how much the environemt has to do with it. Mine were in the kitchen (probably a more bacteria prone location) and i had a ton of crashes. I moved them to the new fish room, and they were fine until I added the 4 tanks in there with them, now they are crashing also. I have a new pre-filter on my air pump, pretty vigorous bubbles, an in-line air filter, I bleach everything, every time, and change the filter floss with each bottle. Yet still they crash...luckily James' do not, I bet I've used ten times more of his than he has.
A few things I've learned, start with a greener culture, and they crash less, I just started two nes ones with half phyto, half new water and they are fine so far. Keep the room cold too, mine are at 74, his run about 70, so that's another variable I have to consider. But the one thing i know is, the darker green they are when they start, the less prone to crashing, and the quicker they grow.