A week, or two ago, I lost a new colony, a mille, and half of a much older colony, a deep water pieces that I've had for almost a year.
I was using IO, which I loath with a passion, at the time of the RTN (mille) and STN (deep water). I ended up unplugging both my reactors, Ca and Kalk., and it stopped. I've tracked my parameters for years with an excel spreadsheet and every year around this time I have RTN/STN. The only consistent factor year after year is the water. Always run through RO/DI, however its always occured just after a warm spot.
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