home made canister..lets see if it workks tommarow

[Jgray152]

If the pump is sucking faster than water is getting dragged through it will cavitate. The impellar will spin at the same rate, and if the water aint there it will be running dry.

Right, but the water IS there. If the impeller cavitates, dissolved gases are released causing some air to be thrown around but not enough gases will be present to push all the water away from the impeller and pump.

If there is a blockage, say you close the intake or output valve, the impeller will actually spin FASTER and use less power because there is very little energy needed to spin the water that is in the impeller housing. Once you release the blockage, the impeller slows down because now there is a resistance due to the extra energy needed to move the water.

If you push the water into the canister as the resistance increases the impellar will slow down as it works harder pushing the water through...Thus it wont cavitate...

Actually the exact opposite happends. Read above.

It was someone on here that explained that to me.

Read Quote below

Whoever you got that information from needs to step back and not give advise.

 

[Jgray152]

i am going to be using a 5 gallon bucket and have a huge pump on the bottom with a pipe attached to it running in the center to the top of the bucket.poring water into two 55 gallon tanks. i am going to have to smaller pumps one in each 55g poring water into the 5gallon bucket. and i will have my media stacked in the bucket. was even thinking about having a hand vac (python) in each tank instead of a small pump. would that work good ?¿? any one know??¿ might try it...idk and what do u guys think of the idea about the sump bucket?

Recipe for disaster is sounds like. Using more than one pump right after one another could cause a wet mess if they are not perfectly tuned to the same exact flow rate. Plus other issues could arise.

 

[xboroinc]

okay now i am doing a 20 gallon long with one big pump in it and it is going to be flowing threw one tank on its own suction and pressure. hope it works already tried it but dnt no how it will work in the long run. eventually i want to put it onto two tanks