I usually do 5g at weekly intervals on a 40g system. I have to heat the water to avoid temp spikes and the alk in my WC water is always lower than where I'd like to see it. Tonight was playing with one of those WC calculators online and it turned out I'd be just as good doing a gallon every day instead of the hubbabaloo I go through on the weekends with the 5g jugs. Doing them daily takes less than a minute with a couple of one gallon jugs and I don't have to worry about parameter swings or futz around with turning my pumps off. Anyone else run their WC's like this, past/present/future?
http://reefkeeping.com/issues/2005-10/rhf/index.php#10
http://www.beananimal.com/tools/aquarium-water-change-calculator.aspx
http://reefkeeping.com/issues/2005-10/rhf/index.php#10
http://www.beananimal.com/tools/aquarium-water-change-calculator.aspx