shallow tanks are the awsome. I just setup my 33g long and only plan on running 2x54w t5's.
If everyone just does little things, it makes a big difference when you have a couple million people doing them, much like buying stuff for your tank. Plumbing parts are pretty cheap on a 20g but when you start plumbing a big tank and you have 10 gate valves, 20 ball valves, all kinds of elbows and etc, it adds up fast.
My biggest personal achievement has been my showering habits. I used to blast the water for 10minutes, now i just have enough flow to wash the soap out of my hair and i try to be quick about (except on shaving day when it takes a little longer).
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never say never
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