I use this recipe, minus the baking soda.
http://www.aquatic-eden.com/2006/09/...nsity.html?m=1
I run three 64oz juice bottles into a 12oz Gatorade drip/snot bottle, then into the intake of my fluval fx5 on my 125. It's not much, and I just upgraded from one to three bottles about a week or two ago, not enough time to tell a difference yet.
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