05-07-2009, 08:36 AM
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Looks like you are using it on a 10gal tank. The smaller the tank, the harder it is for me to get the syphon going. I preffer to use a syphon with a hand pump on my smaller tanks.
Once you get the syphon going, as long as the sucking end remains under water the flow should continue.
I stick the gravel vac down into the gravel, until it gently hits the bottom of the tank. I then raise it to let any gravel fall out, then move on to another area and repeat.
Lets see if I can explain how to start the flow.
One way is to use you mouth and suck on the end that goes into the bucket like a straw. Caution, doing it this way you are very likely at some point get fish water in your mouth.
Another way, put the gravel vac part in the tank, let it fill with water. Put your finger over the tubing end of the syphon. Raise the gravel vac straight up into the air, release your finger from the tubing, when the water flow starts to flow out of the gravel vac and into the tubing quickly put the gravel vac part under water.
One more way, if you have enough room to lay the gravel vac vertical under the water, rock the gravel vac end up out of the water a little, till you see water start to flow down the tubing, then quickly put the gravel vac end back under the water.