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hi tank girl,
first - thanks for the quick reply :D
second - the links u gave me mainly discuss the cost effective of the device
i am very pleased from the unit & my plant love it very much
i am asking somebody who has the device to answer my question please 8)
I have been using thus device for about 2 months now. the device lowers the kh of my waters, but my question is :
1. can it be that it is raising my gh ?
2. if he changes the kh so how can i calaulate my co2 ?
thanks in advance