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Very good info, MCA. I especially found the 'air pumps' attachment really helpful. I like the comparison chart of the different air pumps. I wonder how the Hi-blow brand of air pump compares to these models. Also, I assume that the 40L per 1200 gallons of pond water includes both the air that is used to aerate the pond and the air that is used to aerate the filtration system.
It would be nice if one of us could compile a list of the different brands and their advantages and disadvanges. We could also use comparison charts for the digital DO and ORP devices as well. This would really help those that are new to the hobby such as myself from wasting their time and effort in experimenting with different devices. Once again, very helpful thread. Thank you.
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