Originally Posted by sparkyjoe
Oh, smaller tanks are possible because the rate of water removal and replacement is controllable by how high you turn on the sink fawcett.
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Not exactly. It's controlled more by the difference in height between the tank and where the hose is being drained. I've tested this. I can get my 55 gal goldfish tank started without the use of the sink faucet, and the water flow is faster when I do it this way. I have used the sink faucet once or twice to test it, and the flow was slower because the sink is higher than my bathtub drain.
You guys must have a smaller diameter siphon than I do because it could easily suck up a fish if I'm not there to hold it. I have the siphon rated for 100 gal tanks. It's physically taller than my 10 gal tanks. I use a smaller siphon there because I don't want to destroy my plants or fish.