Cheers Photon,
Yeah, basically on hindsight the cycling wasn't the best of moves. It was just the 0.5 after <24 hours that had me thinking it was going up too fast and thus the need for dilution.
Just had a google on ammonia in tap water.
Quote:
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In recent years, water treatment plants have turned to chloramine as an alternative to chlorine. Chloramine combines ammonia with chlorine, which gives it the advantage of being more stable than chlorine by itself. Using Chloramine makes it easier to attain the legal level of chlorine in the water.
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http://freshaquarium.about.com/od/wa.../f/faq0050.htm
Possibly chloramine in Ottawa, chlorine in Calgary? Only explanation I can think of.
I'm using the dropper kit.